UPDATE: docs -> demos and update paths in m and py demos

17 files changed, 0 insertions, 3421 deletions

diff --git a/docs/data/SinoInpaint.mat b/docs/data/SinoInpaint.mat
deleted file mode 100644
index d748fb4..0000000
--- a/docs/data/SinoInpaint.mat
+++ /dev/null
diff --git a/docs/data/lena_gray_512.tif b/docs/data/lena_gray_512.tif
deleted file mode 100644
index f80cafc..0000000
--- a/docs/data/lena_gray_512.tif
+++ /dev/null
diff --git a/docs/demos/demoMatlab_3Ddenoise.m b/docs/demos/demoMatlab_3Ddenoise.m
deleted file mode 100644
index 0c331a4..0000000
--- a/docs/demos/demoMatlab_3Ddenoise.m
+++ /dev/null
@@ -1,178 +0,0 @@
-% Volume (3D) denoising demo using CCPi-RGL
-clear; close all
-Path1 = sprintf(['..' filesep 'mex_compile' filesep 'installed'], 1i);
-Path2 = sprintf(['..' filesep '..' filesep '..' filesep 'data' filesep], 1i);
-Path3 = sprintf(['..' filesep 'supp'], 1i);
-addpath(Path1);
-addpath(Path2);
-addpath(Path3);
-
-N = 512; 
-slices = 7;
-vol3D = zeros(N,N,slices, 'single');
-Ideal3D = zeros(N,N,slices, 'single');
-Im = double(imread('lena_gray_512.tif'))/255;  % loading image
-for i = 1:slices
-vol3D(:,:,i) = Im + .05*randn(size(Im)); 
-Ideal3D(:,:,i) = Im;
-end
-vol3D(vol3D < 0) = 0;
-figure; imshow(vol3D(:,:,15), [0 1]); title('Noisy image');
-
-
-lambda_reg = 0.03; % regularsation parameter for all methods
-%%
-fprintf('Denoise a volume using the ROF-TV model (CPU) \n');
-tau_rof = 0.0025; % time-marching constant 
-iter_rof = 300; % number of ROF iterations
-tic; u_rof = ROF_TV(single(vol3D), lambda_reg, iter_rof, tau_rof); toc; 
-energyfunc_val_rof = TV_energy(single(u_rof),single(vol3D),lambda_reg, 1);  % get energy function value
-rmse_rof = (RMSE(Ideal3D(:),u_rof(:)));
-fprintf('%s %f \n', 'RMSE error for ROF is:', rmse_rof);
-figure; imshow(u_rof(:,:,7), [0 1]); title('ROF-TV denoised volume (CPU)');
-%%
-% fprintf('Denoise a volume using the ROF-TV model (GPU) \n');
-% tau_rof = 0.0025; % time-marching constant 
-% iter_rof = 300; % number of ROF iterations
-% tic; u_rofG = ROF_TV_GPU(single(vol3D), lambda_reg, iter_rof, tau_rof); toc;
-% rmse_rofG = (RMSE(Ideal3D(:),u_rofG(:)));
-% fprintf('%s %f \n', 'RMSE error for ROF is:', rmse_rofG);
-% figure; imshow(u_rofG(:,:,7), [0 1]); title('ROF-TV denoised volume (GPU)');
-%%
-fprintf('Denoise a volume using the FGP-TV model (CPU) \n');
-iter_fgp = 300; % number of FGP iterations
-epsil_tol =  1.0e-05; % tolerance
-tic; u_fgp = FGP_TV(single(vol3D), lambda_reg, iter_fgp, epsil_tol); toc; 
-energyfunc_val_fgp = TV_energy(single(u_fgp),single(vol3D),lambda_reg, 1); % get energy function value
-rmse_fgp = (RMSE(Ideal3D(:),u_fgp(:)));
-fprintf('%s %f \n', 'RMSE error for FGP-TV is:', rmse_fgp);
-figure; imshow(u_fgp(:,:,7), [0 1]); title('FGP-TV denoised volume (CPU)');
-%%
-% fprintf('Denoise a volume using the FGP-TV model (GPU) \n');
-% iter_fgp = 300; % number of FGP iterations
-% epsil_tol =  1.0e-05; % tolerance
-% tic; u_fgpG = FGP_TV_GPU(single(vol3D), lambda_reg, iter_fgp, epsil_tol); toc; 
-% rmse_fgpG = (RMSE(Ideal3D(:),u_fgpG(:)));
-% fprintf('%s %f \n', 'RMSE error for FGP-TV is:', rmse_fgpG);
-% figure; imshow(u_fgpG(:,:,7), [0 1]); title('FGP-TV denoised volume (GPU)');
-%%
-fprintf('Denoise a volume using the SB-TV model (CPU) \n');
-iter_sb = 150; % number of SB iterations
-epsil_tol =  1.0e-05; % tolerance
-tic; u_sb = SB_TV(single(vol3D), lambda_reg, iter_sb, epsil_tol); toc; 
-energyfunc_val_sb = TV_energy(single(u_sb),single(vol3D),lambda_reg, 1);  % get energy function value
-rmse_sb = (RMSE(Ideal3D(:),u_sb(:)));
-fprintf('%s %f \n', 'RMSE error for SB-TV is:', rmse_sb);
-figure; imshow(u_sb(:,:,7), [0 1]); title('SB-TV denoised volume (CPU)');
-%%
-% fprintf('Denoise a volume using the SB-TV model (GPU) \n');
-% iter_sb = 150; % number of SB iterations
-% epsil_tol =  1.0e-05; % tolerance
-% tic; u_sbG = SB_TV_GPU(single(vol3D), lambda_reg, iter_sb, epsil_tol); toc; 
-% rmse_sbG = (RMSE(Ideal3D(:),u_sbG(:)));
-% fprintf('%s %f \n', 'RMSE error for SB-TV is:', rmse_sbG);
-% figure; imshow(u_sbG(:,:,7), [0 1]); title('SB-TV denoised volume (GPU)');
-%%
-fprintf('Denoise a volume using the ROF-LLT model (CPU) \n');
-lambda_ROF = lambda_reg; % ROF regularisation parameter
-lambda_LLT = lambda_reg*0.35; % LLT regularisation parameter
-iter_LLT = 300; % iterations 
-tau_rof_llt = 0.0025; % time-marching constant 
-tic; u_rof_llt = LLT_ROF(single(vol3D), lambda_ROF, lambda_LLT, iter_LLT, tau_rof_llt); toc; 
-rmse_rof_llt = (RMSE(Ideal3D(:),u_rof_llt(:)));
-fprintf('%s %f \n', 'RMSE error for ROF-LLT is:', rmse_rof_llt);
-figure; imshow(u_rof_llt(:,:,7), [0 1]); title('ROF-LLT denoised volume (CPU)');
-%%
-% fprintf('Denoise a volume using the ROF-LLT model (GPU) \n');
-% lambda_ROF = lambda_reg; % ROF regularisation parameter
-% lambda_LLT = lambda_reg*0.35; % LLT regularisation parameter
-% iter_LLT = 300; % iterations 
-% tau_rof_llt = 0.0025; % time-marching constant 
-% tic; u_rof_llt_g = LLT_ROF_GPU(single(vol3D), lambda_ROF, lambda_LLT, iter_LLT, tau_rof_llt); toc; 
-% rmse_rof_llt = (RMSE(Ideal3D(:),u_rof_llt_g(:)));
-% fprintf('%s %f \n', 'RMSE error for ROF-LLT is:', rmse_rof_llt);
-% figure; imshow(u_rof_llt_g(:,:,7), [0 1]); title('ROF-LLT denoised volume (GPU)');
-%%
-fprintf('Denoise a volume using Nonlinear-Diffusion model (CPU) \n');
-iter_diff = 300; % number of diffusion iterations
-lambda_regDiff = 0.025; % regularisation for the diffusivity 
-sigmaPar = 0.015; % edge-preserving parameter
-tau_param = 0.025; % time-marching constant 
-tic; u_diff = NonlDiff(single(vol3D), lambda_regDiff, sigmaPar, iter_diff, tau_param, 'Huber'); toc; 
-rmse_diff = (RMSE(Ideal3D(:),u_diff(:)));
-fprintf('%s %f \n', 'RMSE error for Diffusion is:', rmse_diff);
-figure; imshow(u_diff(:,:,7), [0 1]); title('Diffusion denoised volume (CPU)');
-%%
-% fprintf('Denoise a volume using Nonlinear-Diffusion model (GPU) \n');
-% iter_diff = 300; % number of diffusion iterations
-% lambda_regDiff = 0.025; % regularisation for the diffusivity 
-% sigmaPar = 0.015; % edge-preserving parameter
-% tau_param = 0.025; % time-marching constant 
-% tic; u_diff_g = NonlDiff_GPU(single(vol3D), lambda_regDiff, sigmaPar, iter_diff, tau_param, 'Huber'); toc; 
-% rmse_diff = (RMSE(Ideal3D(:),u_diff_g(:)));
-% fprintf('%s %f \n', 'RMSE error for Diffusion is:', rmse_diff);
-% figure; imshow(u_diff_g(:,:,7), [0 1]); title('Diffusion denoised volume (GPU)');
-%%
-fprintf('Denoise using Fourth-order anisotropic diffusion model (CPU) \n');
-iter_diff = 300; % number of diffusion iterations
-lambda_regDiff = 3.5; % regularisation for the diffusivity 
-sigmaPar = 0.02; % edge-preserving parameter
-tau_param = 0.0015; % time-marching constant 
-tic; u_diff4 = Diffusion_4thO(single(vol3D), lambda_regDiff, sigmaPar, iter_diff, tau_param); toc; 
-rmse_diff4 = (RMSE(Ideal3D(:),u_diff4(:)));
-fprintf('%s %f \n', 'RMSE error for Anis.Diff of 4th order is:', rmse_diff4);
-figure; imshow(u_diff4(:,:,7), [0 1]); title('Diffusion 4thO denoised volume (CPU)');
-%%
-% fprintf('Denoise using Fourth-order anisotropic diffusion model (GPU) \n');
-% iter_diff = 300; % number of diffusion iterations
-% lambda_regDiff = 3.5; % regularisation for the diffusivity 
-% sigmaPar = 0.02; % edge-preserving parameter
-% tau_param = 0.0015; % time-marching constant 
-% tic; u_diff4_g = Diffusion_4thO_GPU(single(vol3D), lambda_regDiff, sigmaPar, iter_diff, tau_param); toc; 
-% rmse_diff4 = (RMSE(Ideal3D(:),u_diff4_g(:)));
-% fprintf('%s %f \n', 'RMSE error for Anis.Diff of 4th order is:', rmse_diff4);
-% figure; imshow(u_diff4_g(:,:,7), [0 1]); title('Diffusion 4thO denoised volume (GPU)');
-%%
-fprintf('Denoise using the TGV model (CPU) \n');
-lambda_TGV = 0.03; % regularisation parameter
-alpha1 = 1.0; % parameter to control the first-order term
-alpha0 = 2.0; % parameter to control the second-order term
-iter_TGV = 500; % number of Primal-Dual iterations for TGV
-tic; u_tgv = TGV(single(vol3D), lambda_TGV, alpha1, alpha0, iter_TGV); toc; 
-rmseTGV = RMSE(Ideal3D(:),u_tgv(:));
-fprintf('%s %f \n', 'RMSE error for TGV is:', rmseTGV);
-figure; imshow(u_tgv(:,:,3), [0 1]); title('TGV denoised volume (CPU)');
-%%
-%>>>>>>>>>>>>>> MULTI-CHANNEL priors <<<<<<<<<<<<<<< %
-fprintf('Denoise a volume using the FGP-dTV model (CPU) \n');
-
-% create another volume (reference) with slightly less amount of noise
-vol3D_ref = zeros(N,N,slices, 'single');
-for i = 1:slices
-vol3D_ref(:,:,i) = Im + .01*randn(size(Im)); 
-end
-vol3D_ref(vol3D_ref < 0) = 0;
-% vol3D_ref = zeros(size(Im),'single'); % pass zero reference (dTV -> TV)
-
-iter_fgp = 300; % number of FGP iterations
-epsil_tol =  1.0e-05; % tolerance
-eta =  0.2; % Reference image gradient smoothing constant
-tic; u_fgp_dtv = FGP_dTV(single(vol3D), single(vol3D_ref), lambda_reg, iter_fgp, epsil_tol, eta); toc; 
-figure; imshow(u_fgp_dtv(:,:,7), [0 1]); title('FGP-dTV denoised volume (CPU)');
-%%
-fprintf('Denoise a volume using the FGP-dTV model (GPU) \n');
-
-% create another volume (reference) with slightly less amount of noise
-vol3D_ref = zeros(N,N,slices, 'single');
-for i = 1:slices
-vol3D_ref(:,:,i) = Im + .01*randn(size(Im)); 
-end
-vol3D_ref(vol3D_ref < 0) = 0;
-% vol3D_ref = zeros(size(Im),'single'); % pass zero reference (dTV -> TV)
-
-iter_fgp = 300; % number of FGP iterations
-epsil_tol =  1.0e-05; % tolerance
-eta =  0.2; % Reference image gradient smoothing constant
-tic; u_fgp_dtv_g = FGP_dTV_GPU(single(vol3D), single(vol3D_ref), lambda_reg, iter_fgp, epsil_tol, eta); toc; 
-figure; imshow(u_fgp_dtv_g(:,:,7), [0 1]); title('FGP-dTV denoised volume (GPU)');
-%%
diff --git a/docs/demos/demoMatlab_denoise.m b/docs/demos/demoMatlab_denoise.m
deleted file mode 100644
index 14d3096..0000000
--- a/docs/demos/demoMatlab_denoise.m
+++ /dev/null
@@ -1,189 +0,0 @@
-% Image (2D) denoising demo using CCPi-RGL
-clear; close all
-fsep = '/';
-
-Path1 = sprintf(['..' fsep 'mex_compile' fsep 'installed'], 1i);
-Path2 = sprintf(['..' fsep '..' fsep '..' fsep 'data' fsep], 1i);
-Path3 = sprintf(['..' fsep 'supp'], 1i);
-addpath(Path1); addpath(Path2); addpath(Path3);
-
-Im = double(imread('lena_gray_512.tif'))/255;  % loading image
-u0 = Im + .05*randn(size(Im)); u0(u0 < 0) = 0;
-figure; imshow(u0, [0 1]); title('Noisy image');
-
-lambda_reg = 0.03; % regularsation parameter for all methods
-%%
-fprintf('Denoise using the ROF-TV model (CPU) \n');
-tau_rof = 0.0025; % time-marching constant 
-iter_rof = 750; % number of ROF iterations
-tic; u_rof = ROF_TV(single(u0), lambda_reg, iter_rof, tau_rof); toc; 
-energyfunc_val_rof = TV_energy(single(u_rof),single(u0),lambda_reg, 1);  % get energy function value
-rmseROF = (RMSE(u_rof(:),Im(:)));
-fprintf('%s %f \n', 'RMSE error for ROF-TV is:', rmseROF);
-figure; imshow(u_rof, [0 1]); title('ROF-TV denoised image (CPU)');
-%%
-% fprintf('Denoise using the ROF-TV model (GPU) \n');
-% tau_rof = 0.0025; % time-marching constant 
-% iter_rof = 750; % number of ROF iterations
-% tic; u_rofG = ROF_TV_GPU(single(u0), lambda_reg, iter_rof, tau_rof); toc;
-% figure; imshow(u_rofG, [0 1]); title('ROF-TV denoised image (GPU)');
-%%
-fprintf('Denoise using the FGP-TV model (CPU) \n');
-iter_fgp = 1000; % number of FGP iterations
-epsil_tol =  1.0e-06; % tolerance
-tic; u_fgp = FGP_TV(single(u0), lambda_reg, iter_fgp, epsil_tol); toc; 
-energyfunc_val_fgp = TV_energy(single(u_fgp),single(u0),lambda_reg, 1); % get energy function value
-rmseFGP = (RMSE(u_fgp(:),Im(:)));
-fprintf('%s %f \n', 'RMSE error for FGP-TV is:', rmseFGP);
-figure; imshow(u_fgp, [0 1]); title('FGP-TV denoised image (CPU)');
-
-%%
-% fprintf('Denoise using the FGP-TV model (GPU) \n');
-% iter_fgp = 1000; % number of FGP iterations
-% epsil_tol =  1.0e-05; % tolerance
-% tic; u_fgpG = FGP_TV_GPU(single(u0), lambda_reg, iter_fgp, epsil_tol); toc; 
-% figure; imshow(u_fgpG, [0 1]); title('FGP-TV denoised image (GPU)');
-%%
-fprintf('Denoise using the SB-TV model (CPU) \n');
-iter_sb = 150; % number of SB iterations
-epsil_tol =  1.0e-06; % tolerance
-tic; u_sb = SB_TV(single(u0), lambda_reg, iter_sb, epsil_tol); toc; 
-energyfunc_val_sb = TV_energy(single(u_sb),single(u0),lambda_reg, 1);  % get energy function value
-rmseSB = (RMSE(u_sb(:),Im(:)));
-fprintf('%s %f \n', 'RMSE error for SB-TV is:', rmseSB);
-figure; imshow(u_sb, [0 1]); title('SB-TV denoised image (CPU)');
-%%
-% fprintf('Denoise using the SB-TV model (GPU) \n');
-% iter_sb = 150; % number of SB iterations
-% epsil_tol =  1.0e-06; % tolerance
-% tic; u_sbG = SB_TV_GPU(single(u0), lambda_reg, iter_sb, epsil_tol); toc; 
-% figure; imshow(u_sbG, [0 1]); title('SB-TV denoised image (GPU)');
-%%
-fprintf('Denoise using the TGV model (CPU) \n');
-lambda_TGV = 0.045; % regularisation parameter
-alpha1 = 1.0; % parameter to control the first-order term
-alpha0 = 2.0; % parameter to control the second-order term
-iter_TGV = 2000; % number of Primal-Dual iterations for TGV
-tic; u_tgv = TGV(single(u0), lambda_TGV, alpha1, alpha0, iter_TGV); toc; 
-rmseTGV = (RMSE(u_tgv(:),Im(:)));
-fprintf('%s %f \n', 'RMSE error for TGV is:', rmseTGV);
-figure; imshow(u_tgv, [0 1]); title('TGV denoised image (CPU)');
-%%
-% fprintf('Denoise using the TGV model (GPU) \n');
-% lambda_TGV = 0.045; % regularisation parameter
-% alpha1 = 1.0; % parameter to control the first-order term
-% alpha0 = 2.0; % parameter to control the second-order term
-% iter_TGV = 2000; % number of Primal-Dual iterations for TGV
-% tic; u_tgv_gpu = TGV_GPU(single(u0), lambda_TGV, alpha1, alpha0, iter_TGV); toc; 
-% rmseTGV_gpu = (RMSE(u_tgv_gpu(:),Im(:)));
-% fprintf('%s %f \n', 'RMSE error for TGV is:', rmseTGV_gpu);
-% figure; imshow(u_tgv_gpu, [0 1]); title('TGV denoised image (GPU)');
-%%
-fprintf('Denoise using the ROF-LLT model (CPU) \n');
-lambda_ROF = lambda_reg; % ROF regularisation parameter
-lambda_LLT = lambda_reg*0.45; % LLT regularisation parameter
-iter_LLT = 1; % iterations 
-tau_rof_llt = 0.0025; % time-marching constant 
-tic; u_rof_llt = LLT_ROF(single(u0), lambda_ROF, lambda_LLT, iter_LLT, tau_rof_llt); toc; 
-rmseROFLLT = (RMSE(u_rof_llt(:),Im(:)));
-fprintf('%s %f \n', 'RMSE error for TGV is:', rmseROFLLT);
-figure; imshow(u_rof_llt, [0 1]); title('ROF-LLT denoised image (CPU)');
-%%
-% fprintf('Denoise using the ROF-LLT model (GPU) \n');
-% lambda_ROF = lambda_reg; % ROF regularisation parameter
-% lambda_LLT = lambda_reg*0.45; % LLT regularisation parameter
-% iter_LLT = 500; % iterations 
-% tau_rof_llt = 0.0025; % time-marching constant 
-% tic; u_rof_llt_g = LLT_ROF_GPU(single(u0), lambda_ROF, lambda_LLT, iter_LLT, tau_rof_llt); toc; 
-% rmseROFLLT_g = (RMSE(u_rof_llt_g(:),Im(:)));
-% fprintf('%s %f \n', 'RMSE error for TGV is:', rmseROFLLT_g);
-% figure; imshow(u_rof_llt_g, [0 1]); title('ROF-LLT denoised image (GPU)');
-%%
-fprintf('Denoise using Nonlinear-Diffusion model (CPU) \n');
-iter_diff = 800; % number of diffusion iterations
-lambda_regDiff = 0.025; % regularisation for the diffusivity 
-sigmaPar = 0.015; % edge-preserving parameter
-tau_param = 0.025; % time-marching constant 
-tic; u_diff = NonlDiff(single(u0), lambda_regDiff, sigmaPar, iter_diff, tau_param, 'Huber'); toc; 
-rmseDiffus = (RMSE(u_diff(:),Im(:)));
-fprintf('%s %f \n', 'RMSE error for Nonlinear Diffusion is:', rmseDiffus);
-figure; imshow(u_diff, [0 1]); title('Diffusion denoised image (CPU)');
-%%
-% fprintf('Denoise using Nonlinear-Diffusion model (GPU) \n');
-% iter_diff = 800; % number of diffusion iterations
-% lambda_regDiff = 0.025; % regularisation for the diffusivity 
-% sigmaPar = 0.015; % edge-preserving parameter
-% tau_param = 0.025; % time-marching constant 
-% tic; u_diff_g = NonlDiff_GPU(single(u0), lambda_regDiff, sigmaPar, iter_diff, tau_param, 'Huber'); toc; 
-% figure; imshow(u_diff_g, [0 1]); title('Diffusion denoised image (GPU)');
-%%
-fprintf('Denoise using Fourth-order anisotropic diffusion model (CPU) \n');
-iter_diff = 800; % number of diffusion iterations
-lambda_regDiff = 3.5; % regularisation for the diffusivity 
-sigmaPar = 0.02; % edge-preserving parameter
-tau_param = 0.0015; % time-marching constant 
-tic; u_diff4 = Diffusion_4thO(single(u0), lambda_regDiff, sigmaPar, iter_diff, tau_param); toc; 
-rmseDiffHO = (RMSE(u_diff4(:),Im(:)));
-fprintf('%s %f \n', 'RMSE error for Fourth-order anisotropic diffusion is:', rmseDiffHO);
-figure; imshow(u_diff4, [0 1]); title('Diffusion 4thO denoised image (CPU)');
-%%
-% fprintf('Denoise using Fourth-order anisotropic diffusion model (GPU) \n');
-% iter_diff = 800; % number of diffusion iterations
-% lambda_regDiff = 3.5; % regularisation for the diffusivity 
-% sigmaPar = 0.02; % edge-preserving parameter
-% tau_param = 0.0015; % time-marching constant 
-% tic; u_diff4_g = Diffusion_4thO_GPU(single(u0), lambda_regDiff, sigmaPar, iter_diff, tau_param); toc; 
-% figure; imshow(u_diff4_g, [0 1]); title('Diffusion 4thO denoised image (GPU)');
-%%
-fprintf('Weights pre-calculation for Non-local TV (takes time on CPU) \n');
-SearchingWindow = 7;
-PatchWindow = 2;
-NeighboursNumber = 20; % the number of neibours to include
-h = 0.23; % edge related parameter for NLM
-tic; [H_i, H_j, Weights] = PatchSelect(single(u0), SearchingWindow, PatchWindow, NeighboursNumber, h); toc;
-%%
-fprintf('Denoise using Non-local Total Variation (CPU) \n');
-iter_nltv = 3; % number of nltv iterations
-lambda_nltv = 0.05; % regularisation parameter for nltv
-tic; u_nltv = Nonlocal_TV(single(u0), H_i, H_j, 0, Weights, lambda_nltv, iter_nltv); toc; 
-rmse_nltv = (RMSE(u_nltv(:),Im(:)));
-fprintf('%s %f \n', 'RMSE error for Non-local Total Variation is:', rmse_nltv);
-figure; imagesc(u_nltv, [0 1]); colormap(gray); daspect([1 1 1]); title('Non-local Total Variation denoised image (CPU)');
-%%
-%>>>>>>>>>>>>>> MULTI-CHANNEL priors <<<<<<<<<<<<<<< %
-
-fprintf('Denoise using the FGP-dTV model (CPU) \n');
-% create another image (reference) with slightly less amount of noise
-u_ref = Im + .01*randn(size(Im)); u_ref(u_ref < 0) = 0;
-% u_ref = zeros(size(Im),'single'); % pass zero reference (dTV -> TV)
-
-iter_fgp = 1000; % number of FGP iterations
-epsil_tol =  1.0e-06; % tolerance
-eta =  0.2; % Reference image gradient smoothing constant
-tic; u_fgp_dtv = FGP_dTV(single(u0), single(u_ref), lambda_reg, iter_fgp, epsil_tol, eta); toc; 
-rmse_dTV= (RMSE(u_fgp_dtv(:),Im(:)));
-fprintf('%s %f \n', 'RMSE error for Directional Total Variation (dTV) is:', rmse_dTV);
-figure; imshow(u_fgp_dtv, [0 1]); title('FGP-dTV denoised image (CPU)');
-%%
-% fprintf('Denoise using the FGP-dTV model (GPU) \n');
-% % create another image (reference) with slightly less amount of noise
-% u_ref = Im + .01*randn(size(Im)); u_ref(u_ref < 0) = 0;
-% % u_ref = zeros(size(Im),'single'); % pass zero reference (dTV -> TV)
-% 
-% iter_fgp = 1000; % number of FGP iterations
-% epsil_tol =  1.0e-06; % tolerance
-% eta =  0.2; % Reference image gradient smoothing constant
-% tic; u_fgp_dtvG = FGP_dTV_GPU(single(u0), single(u_ref), lambda_reg, iter_fgp, epsil_tol, eta); toc; 
-% figure; imshow(u_fgp_dtvG, [0 1]); title('FGP-dTV denoised image (GPU)');
-%%
-fprintf('Denoise using the TNV prior (CPU) \n');
-slices = 5; N = 512;
-vol3D = zeros(N,N,slices, 'single');
-for i = 1:slices
-vol3D(:,:,i) = Im + .05*randn(size(Im)); 
-end
-vol3D(vol3D < 0) = 0;
-
-iter_tnv = 200; % number of TNV iterations
-tic; u_tnv = TNV(single(vol3D), lambda_reg, iter_tnv); toc; 
-figure; imshow(u_tnv(:,:,3), [0 1]); title('TNV denoised stack of channels (CPU)');
diff --git a/docs/demos/demoMatlab_inpaint.m b/docs/demos/demoMatlab_inpaint.m
deleted file mode 100644
index 66f9c15..0000000
--- a/docs/demos/demoMatlab_inpaint.m
+++ /dev/null
@@ -1,35 +0,0 @@
-% Image (2D) inpainting demo using CCPi-RGL
-clear; close all
-Path1 = sprintf(['..' filesep 'mex_compile' filesep 'installed'], 1i);
-Path2 = sprintf(['..' filesep '..' filesep '..' filesep 'data' filesep], 1i);
-addpath(Path1);
-addpath(Path2);
-
-load('SinoInpaint.mat');
-Sinogram = Sinogram./max(Sinogram(:));
-Sino_mask = Sinogram.*(1-single(Mask));
-figure; 
-subplot(1,2,1); imshow(Sino_mask, [0 1]); title('Missing data sinogram');
-subplot(1,2,2); imshow(Mask, [0 1]); title('Mask');
-%%
-fprintf('Inpaint using Linear-Diffusion model (CPU) \n');
-iter_diff = 5000; % number of diffusion iterations
-lambda_regDiff = 6000; % regularisation for the diffusivity 
-sigmaPar = 0.0; % edge-preserving parameter
-tau_param = 0.000075; % time-marching constant 
-tic; u_diff = NonlDiff_Inp(single(Sino_mask), Mask, lambda_regDiff, sigmaPar, iter_diff, tau_param); toc; 
-figure; imshow(u_diff, [0 1]); title('Linear-Diffusion inpainted sinogram (CPU)');
-%%
-fprintf('Inpaint using Nonlinear-Diffusion model (CPU) \n');
-iter_diff = 1500; % number of diffusion iterations
-lambda_regDiff = 80; % regularisation for the diffusivity 
-sigmaPar = 0.00009; % edge-preserving parameter
-tau_param = 0.000008; % time-marching constant 
-tic; u_diff = NonlDiff_Inp(single(Sino_mask), Mask, lambda_regDiff, sigmaPar, iter_diff, tau_param, 'Huber'); toc; 
-figure; imshow(u_diff, [0 1]); title('Non-Linear Diffusion inpainted sinogram (CPU)');
-%%
-fprintf('Inpaint using Nonlocal Vertical Marching model (CPU) \n');
-Increment = 1; % linear increment for the searching window
-tic; [u_nom,maskupd] = NonlocalMarching_Inpaint(single(Sino_mask), Mask, Increment); toc;
-figure; imshow(u_nom, [0 1]); title('NVM inpainted sinogram (CPU)');
-%%
\ No newline at end of file
diff --git a/docs/demos/demo_cpu_inpainters.py b/docs/demos/demo_cpu_inpainters.py
deleted file mode 100644
index 3b4191b..0000000
--- a/docs/demos/demo_cpu_inpainters.py
+++ /dev/null
@@ -1,192 +0,0 @@
-#!/usr/bin/env python3
-# -*- coding: utf-8 -*-
-"""
-Demonstration of CPU inpainters
-@authors: Daniil Kazantsev, Edoardo Pasca
-"""
-
-import matplotlib.pyplot as plt
-import numpy as np
-import os
-import timeit
-from scipy import io
-from ccpi.filters.regularisers import NDF_INP, NVM_INP
-from qualitymetrics import rmse
-###############################################################################
-def printParametersToString(pars):
-        txt = r''
-        for key, value in pars.items():
-            if key== 'algorithm' :
-                txt += "{0} = {1}".format(key, value.__name__)
-            elif key == 'input':
-                txt += "{0} = {1}".format(key, np.shape(value))
-            elif key == 'maskData':
-                txt += "{0} = {1}".format(key, np.shape(value))
-            else:
-                txt += "{0} = {1}".format(key, value)
-            txt += '\n'
-        return txt
-###############################################################################
-
-# read sinogram and the mask
-filename = os.path.join(".." , ".." , ".." , "data" ,"SinoInpaint.mat")
-sino = io.loadmat(filename)
-sino_full = sino.get('Sinogram')
-Mask = sino.get('Mask')
-[angles_dim,detectors_dim] = sino_full.shape
-sino_full = sino_full/np.max(sino_full)
-#apply mask to sinogram
-sino_cut = sino_full*(1-Mask)
-#sino_cut_new = np.zeros((angles_dim,detectors_dim),'float32')
-#sino_cut_new = sino_cut.copy(order='c')
-#sino_cut_new[:] = sino_cut[:]
-sino_cut_new = np.ascontiguousarray(sino_cut, dtype=np.float32);
-#mask = np.zeros((angles_dim,detectors_dim),'uint8')
-#mask =Mask.copy(order='c')
-#mask[:] = Mask[:]
-mask = np.ascontiguousarray(Mask, dtype=np.uint8);
-
-plt.figure(1)
-plt.subplot(121)
-plt.imshow(sino_cut_new,vmin=0.0, vmax=1)
-plt.title('Missing Data sinogram')
-plt.subplot(122)
-plt.imshow(mask)
-plt.title('Mask')
-plt.show()
-#%%
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("___Inpainting using linear diffusion (2D)__")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-
-## plot 
-fig = plt.figure(2)
-plt.suptitle('Performance of linear inpainting using the CPU')
-a=fig.add_subplot(1,2,1)
-a.set_title('Missing data sinogram')
-imgplot = plt.imshow(sino_cut_new,cmap="gray")
-
-# set parameters
-pars = {'algorithm' : NDF_INP, \
-        'input' : sino_cut_new,\
-        'maskData' : mask,\
-        'regularisation_parameter':5000,\
-        'edge_parameter':0,\
-        'number_of_iterations' :5000 ,\
-        'time_marching_parameter':0.000075,\
-        'penalty_type':0
-        }
-        
-start_time = timeit.default_timer()
-ndf_inp_linear = NDF_INP(pars['input'],
-              pars['maskData'],
-              pars['regularisation_parameter'],
-              pars['edge_parameter'], 
-              pars['number_of_iterations'],
-              pars['time_marching_parameter'], 
-              pars['penalty_type'])
-             
-rms = rmse(sino_full, ndf_inp_linear)
-pars['rmse'] = rms
-
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,2,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(ndf_inp_linear, cmap="gray")
-plt.title('{}'.format('Linear diffusion inpainting results'))
-#%%
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("_Inpainting using nonlinear diffusion (2D)_")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-
-## plot 
-fig = plt.figure(3)
-plt.suptitle('Performance of nonlinear diffusion inpainting using the CPU')
-a=fig.add_subplot(1,2,1)
-a.set_title('Missing data sinogram')
-imgplot = plt.imshow(sino_cut_new,cmap="gray")
-
-# set parameters
-pars = {'algorithm' : NDF_INP, \
-        'input' : sino_cut_new,\
-        'maskData' : mask,\
-        'regularisation_parameter':80,\
-        'edge_parameter':0.00009,\
-        'number_of_iterations' :1500 ,\
-        'time_marching_parameter':0.000008,\
-        'penalty_type':1
-        }
-        
-start_time = timeit.default_timer()
-ndf_inp_nonlinear = NDF_INP(pars['input'],
-              pars['maskData'],
-              pars['regularisation_parameter'],
-              pars['edge_parameter'], 
-              pars['number_of_iterations'],
-              pars['time_marching_parameter'], 
-              pars['penalty_type'])
-             
-rms = rmse(sino_full, ndf_inp_nonlinear)
-pars['rmse'] = rms
-
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,2,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(ndf_inp_nonlinear, cmap="gray")
-plt.title('{}'.format('Nonlinear diffusion inpainting results'))
-#%%
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("Inpainting using nonlocal vertical marching")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-
-## plot 
-fig = plt.figure(4)
-plt.suptitle('Performance of NVM inpainting using the CPU')
-a=fig.add_subplot(1,2,1)
-a.set_title('Missing data sinogram')
-imgplot = plt.imshow(sino_cut,cmap="gray")
-
-# set parameters
-pars = {'algorithm' : NVM_INP, \
-        'input' : sino_cut_new,\
-        'maskData' : mask,\
-        'SW_increment': 1,\
-        'number_of_iterations' : 150
-        }
-        
-start_time = timeit.default_timer()
-(nvm_inp, mask_upd) = NVM_INP(pars['input'],
-              pars['maskData'],
-              pars['SW_increment'],
-              pars['number_of_iterations'])
-             
-rms = rmse(sino_full, nvm_inp)
-pars['rmse'] = rms
-
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,2,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(nvm_inp, cmap="gray")
-plt.title('{}'.format('Nonlocal Vertical Marching inpainting results'))
-#%%
diff --git a/docs/demos/demo_cpu_regularisers.py b/docs/demos/demo_cpu_regularisers.py
deleted file mode 100644
index e6befa9..0000000
--- a/docs/demos/demo_cpu_regularisers.py
+++ /dev/null
@@ -1,572 +0,0 @@
-#!/usr/bin/env python3
-# -*- coding: utf-8 -*-
-"""
-Created on Thu Feb 22 11:39:43 2018
-
-Demonstration of CPU regularisers 
-
-@authors: Daniil Kazantsev, Edoardo Pasca
-"""
-
-import matplotlib.pyplot as plt
-import numpy as np
-import os
-import timeit
-from ccpi.filters.regularisers import ROF_TV, FGP_TV, SB_TV, TGV, LLT_ROF, FGP_dTV, TNV, NDF, Diff4th
-from ccpi.filters.regularisers import PatchSelect, NLTV
-from qualitymetrics import rmse
-###############################################################################
-def printParametersToString(pars):
-        txt = r''
-        for key, value in pars.items():
-            if key== 'algorithm' :
-                txt += "{0} = {1}".format(key, value.__name__)
-            elif key == 'input':
-                txt += "{0} = {1}".format(key, np.shape(value))
-            elif key == 'refdata':
-                txt += "{0} = {1}".format(key, np.shape(value))
-            else:
-                txt += "{0} = {1}".format(key, value)
-            txt += '\n'
-        return txt
-###############################################################################
-#%%
-filename = os.path.join(".." , ".." , ".." , "data" ,"lena_gray_512.tif")
-
-# read image
-Im = plt.imread(filename)
-Im = np.asarray(Im, dtype='float32')
-
-Im = Im/255.0
-perc = 0.05
-u0 = Im + np.random.normal(loc = 0 ,
-                                  scale = perc * Im , 
-                                  size = np.shape(Im))
-u_ref = Im + np.random.normal(loc = 0 ,
-                                  scale = 0.01 * Im , 
-                                  size = np.shape(Im))
-(N,M) = np.shape(u0)
-# map the u0 u0->u0>0
-# f = np.frompyfunc(lambda x: 0 if x < 0 else x, 1,1)
-u0 = u0.astype('float32')
-u_ref = u_ref.astype('float32')
-
-# change dims to check that modules work with non-squared images
-"""
-M = M-100
-u_ref2 = np.zeros([N,M],dtype='float32')
-u_ref2[:,0:M] = u_ref[:,0:M]
-u_ref = u_ref2
-del u_ref2
-
-u02 = np.zeros([N,M],dtype='float32')
-u02[:,0:M] = u0[:,0:M]
-u0 = u02
-del u02
-
-Im2 = np.zeros([N,M],dtype='float32')
-Im2[:,0:M] = Im[:,0:M]
-Im = Im2
-del Im2
-"""
-#%%
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("_______________ROF-TV (2D)_________________")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-
-## plot 
-fig = plt.figure()
-plt.suptitle('Performance of ROF-TV regulariser using the CPU')
-a=fig.add_subplot(1,2,1)
-a.set_title('Noisy Image')
-imgplot = plt.imshow(u0,cmap="gray")
-
-# set parameters
-pars = {'algorithm': ROF_TV, \
-        'input' : u0,\
-        'regularisation_parameter':0.04,\
-        'number_of_iterations': 1200,\
-        'time_marching_parameter': 0.0025        
-        }
-print ("#############ROF TV CPU####################")
-start_time = timeit.default_timer()
-rof_cpu = ROF_TV(pars['input'],
-             pars['regularisation_parameter'],
-             pars['number_of_iterations'],
-             pars['time_marching_parameter'],'cpu')
-rms = rmse(Im, rof_cpu)
-pars['rmse'] = rms
-
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,2,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(rof_cpu, cmap="gray")
-plt.title('{}'.format('CPU results'))
-
-#%%
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("_______________FGP-TV (2D)__________________")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-
-## plot 
-fig = plt.figure()
-plt.suptitle('Performance of FGP-TV regulariser using the CPU')
-a=fig.add_subplot(1,2,1)
-a.set_title('Noisy Image')
-imgplot = plt.imshow(u0,cmap="gray")
-
-# set parameters
-pars = {'algorithm' : FGP_TV, \
-        'input' : u0,\
-        'regularisation_parameter':0.04, \
-        'number_of_iterations' :2000 ,\
-        'tolerance_constant':1e-06,\
-        'methodTV': 0 ,\
-        'nonneg': 0 ,\
-        'printingOut': 0 
-        }
-        
-print ("#############FGP TV CPU####################")
-start_time = timeit.default_timer()
-fgp_cpu = FGP_TV(pars['input'], 
-              pars['regularisation_parameter'],
-              pars['number_of_iterations'],
-              pars['tolerance_constant'], 
-              pars['methodTV'],
-              pars['nonneg'],
-              pars['printingOut'],'cpu')  
-             
-             
-rms = rmse(Im, fgp_cpu)
-pars['rmse'] = rms
-
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,2,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(fgp_cpu, cmap="gray")
-plt.title('{}'.format('CPU results'))
-
-#%%
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("_______________SB-TV (2D)__________________")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-
-## plot 
-fig = plt.figure()
-plt.suptitle('Performance of SB-TV regulariser using the CPU')
-a=fig.add_subplot(1,2,1)
-a.set_title('Noisy Image')
-imgplot = plt.imshow(u0,cmap="gray")
-
-# set parameters
-pars = {'algorithm' : SB_TV, \
-        'input' : u0,\
-        'regularisation_parameter':0.04, \
-        'number_of_iterations' :150 ,\
-        'tolerance_constant':1e-06,\
-        'methodTV': 0 ,\
-        'printingOut': 0 
-        }
-        
-print ("#############SB TV CPU####################")
-start_time = timeit.default_timer()
-sb_cpu = SB_TV(pars['input'], 
-              pars['regularisation_parameter'],
-              pars['number_of_iterations'],
-              pars['tolerance_constant'], 
-              pars['methodTV'],
-              pars['printingOut'],'cpu')  
-             
-             
-rms = rmse(Im, sb_cpu)
-pars['rmse'] = rms
-
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,2,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(sb_cpu, cmap="gray")
-plt.title('{}'.format('CPU results'))
-#%%
-
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("_____Total Generalised Variation (2D)______")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-
-## plot 
-fig = plt.figure()
-plt.suptitle('Performance of TGV regulariser using the CPU')
-a=fig.add_subplot(1,2,1)
-a.set_title('Noisy Image')
-imgplot = plt.imshow(u0,cmap="gray")
-
-# set parameters
-pars = {'algorithm' : TGV, \
-        'input' : u0,\
-        'regularisation_parameter':0.04, \
-        'alpha1':1.0,\
-        'alpha0':2.0,\
-        'number_of_iterations' :1350 ,\
-        'LipshitzConstant' :12 ,\
-        }
-        
-print ("#############TGV CPU####################")
-start_time = timeit.default_timer()
-tgv_cpu = TGV(pars['input'], 
-              pars['regularisation_parameter'],
-              pars['alpha1'],
-              pars['alpha0'],
-              pars['number_of_iterations'],
-              pars['LipshitzConstant'],'cpu')
-             
-             
-rms = rmse(Im, tgv_cpu)
-pars['rmse'] = rms
-
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,2,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(tgv_cpu, cmap="gray")
-plt.title('{}'.format('CPU results'))
-
-#%%
-
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("______________LLT- ROF (2D)________________")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-
-## plot 
-fig = plt.figure()
-plt.suptitle('Performance of LLT-ROF regulariser using the CPU')
-a=fig.add_subplot(1,2,1)
-a.set_title('Noisy Image')
-imgplot = plt.imshow(u0,cmap="gray")
-
-# set parameters
-pars = {'algorithm' : LLT_ROF, \
-        'input' : u0,\
-        'regularisation_parameterROF':0.04, \
-        'regularisation_parameterLLT':0.01, \
-        'number_of_iterations' :500 ,\
-        'time_marching_parameter' :0.0025 ,\
-        }
-        
-print ("#############LLT- ROF CPU####################")
-start_time = timeit.default_timer()
-lltrof_cpu = LLT_ROF(pars['input'], 
-              pars['regularisation_parameterROF'],
-              pars['regularisation_parameterLLT'],
-              pars['number_of_iterations'],
-              pars['time_marching_parameter'],'cpu')
-
-rms = rmse(Im, lltrof_cpu)
-pars['rmse'] = rms
-
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,2,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(lltrof_cpu, cmap="gray")
-plt.title('{}'.format('CPU results'))
-
-#%%
-
-
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("________________NDF (2D)___________________")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-
-## plot 
-fig = plt.figure()
-plt.suptitle('Performance of NDF regulariser using the CPU')
-a=fig.add_subplot(1,2,1)
-a.set_title('Noisy Image')
-imgplot = plt.imshow(u0,cmap="gray")
-
-# set parameters
-pars = {'algorithm' : NDF, \
-        'input' : u0,\
-        'regularisation_parameter':0.025, \
-        'edge_parameter':0.015,\
-        'number_of_iterations' :500 ,\
-        'time_marching_parameter':0.025,\
-        'penalty_type':1
-        }
-        
-print ("#############NDF CPU################")
-start_time = timeit.default_timer()
-ndf_cpu = NDF(pars['input'], 
-              pars['regularisation_parameter'],
-              pars['edge_parameter'], 
-              pars['number_of_iterations'],
-              pars['time_marching_parameter'], 
-              pars['penalty_type'],'cpu')  
-             
-rms = rmse(Im, ndf_cpu)
-pars['rmse'] = rms
-
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,2,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(ndf_cpu, cmap="gray")
-plt.title('{}'.format('CPU results'))
-
-#%%
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("___Anisotropic Diffusion 4th Order (2D)____")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-
-## plot 
-fig = plt.figure()
-plt.suptitle('Performance of Diff4th regulariser using the CPU')
-a=fig.add_subplot(1,2,1)
-a.set_title('Noisy Image')
-imgplot = plt.imshow(u0,cmap="gray")
-
-# set parameters
-pars = {'algorithm' : Diff4th, \
-        'input' : u0,\
-        'regularisation_parameter':3.5, \
-        'edge_parameter':0.02,\
-        'number_of_iterations' :500 ,\
-        'time_marching_parameter':0.0015
-        }
-        
-print ("#############Diff4th CPU################")
-start_time = timeit.default_timer()
-diff4_cpu = Diff4th(pars['input'], 
-              pars['regularisation_parameter'],
-              pars['edge_parameter'], 
-              pars['number_of_iterations'],
-              pars['time_marching_parameter'],'cpu')
-             
-rms = rmse(Im, diff4_cpu)
-pars['rmse'] = rms
-
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,2,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(diff4_cpu, cmap="gray")
-plt.title('{}'.format('CPU results'))
-
-#%%
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("___Nonlocal patches pre-calculation____")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-start_time = timeit.default_timer()
-# set parameters
-pars = {'algorithm' : PatchSelect, \
-        'input' : u0,\
-        'searchwindow': 7, \
-        'patchwindow': 2,\
-        'neighbours' : 15 ,\
-        'edge_parameter':0.18}
-
-H_i, H_j, Weights = PatchSelect(pars['input'], 
-              pars['searchwindow'],
-              pars['patchwindow'], 
-              pars['neighbours'],
-              pars['edge_parameter'],'cpu')
-              
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-"""
-plt.figure()
-plt.imshow(Weights[0,:,:],cmap="gray",interpolation="nearest",vmin=0, vmax=1)
-plt.show()
-"""
-#%%
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("___Nonlocal Total Variation penalty____")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-## plot 
-fig = plt.figure()
-plt.suptitle('Performance of NLTV regulariser using the CPU')
-a=fig.add_subplot(1,2,1)
-a.set_title('Noisy Image')
-imgplot = plt.imshow(u0,cmap="gray")
-
-pars2 = {'algorithm' : NLTV, \
-        'input' : u0,\
-        'H_i': H_i, \
-        'H_j': H_j,\
-        'H_k' : 0,\
-        'Weights' : Weights,\
-        'regularisation_parameter': 0.04,\
-        'iterations': 3
-        }
-start_time = timeit.default_timer()
-nltv_cpu = NLTV(pars2['input'], 
-              pars2['H_i'],
-              pars2['H_j'], 
-              pars2['H_k'],
-              pars2['Weights'],
-              pars2['regularisation_parameter'],
-              pars2['iterations'])
-
-rms = rmse(Im, nltv_cpu)
-pars['rmse'] = rms
-
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,2,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(nltv_cpu, cmap="gray")
-plt.title('{}'.format('CPU results'))
-
-#%%
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("_____________FGP-dTV (2D)__________________")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-
-## plot 
-fig = plt.figure()
-plt.suptitle('Performance of FGP-dTV regulariser using the CPU')
-a=fig.add_subplot(1,2,1)
-a.set_title('Noisy Image')
-imgplot = plt.imshow(u0,cmap="gray")
-
-# set parameters
-pars = {'algorithm' : FGP_dTV, \
-        'input' : u0,\
-        'refdata' : u_ref,\
-        'regularisation_parameter':0.04, \
-        'number_of_iterations' :2000 ,\
-        'tolerance_constant':1e-06,\
-        'eta_const':0.2,\
-        'methodTV': 0 ,\
-        'nonneg': 0 ,\
-        'printingOut': 0 
-        }
-        
-print ("#############FGP dTV CPU####################")
-start_time = timeit.default_timer()
-fgp_dtv_cpu = FGP_dTV(pars['input'], 
-              pars['refdata'], 
-              pars['regularisation_parameter'],
-              pars['number_of_iterations'],
-              pars['tolerance_constant'], 
-              pars['eta_const'], 
-              pars['methodTV'],
-              pars['nonneg'],
-              pars['printingOut'],'cpu')
-             
-rms = rmse(Im, fgp_dtv_cpu)
-pars['rmse'] = rms
-
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,2,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(fgp_dtv_cpu, cmap="gray")
-plt.title('{}'.format('CPU results'))
-#%%
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("__________Total nuclear Variation__________")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-
-## plot 
-fig = plt.figure()
-plt.suptitle('Performance of TNV regulariser using the CPU')
-a=fig.add_subplot(1,2,1)
-a.set_title('Noisy Image')
-imgplot = plt.imshow(u0,cmap="gray")
-
-channelsNo = 5
-noisyVol = np.zeros((channelsNo,N,M),dtype='float32')
-idealVol = np.zeros((channelsNo,N,M),dtype='float32')
-
-for i in range (channelsNo):
-    noisyVol[i,:,:] = Im + np.random.normal(loc = 0 , scale = perc * Im , size = np.shape(Im))
-    idealVol[i,:,:] = Im
-
-# set parameters
-pars = {'algorithm' : TNV, \
-        'input' : noisyVol,\
-        'regularisation_parameter': 0.04, \
-        'number_of_iterations' : 200 ,\
-        'tolerance_constant':1e-05
-        }
-        
-print ("#############TNV CPU#################")
-start_time = timeit.default_timer()
-tnv_cpu = TNV(pars['input'],           
-              pars['regularisation_parameter'],
-              pars['number_of_iterations'],
-              pars['tolerance_constant'])
-             
-rms = rmse(idealVol, tnv_cpu)
-pars['rmse'] = rms
-
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,2,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(tnv_cpu[3,:,:], cmap="gray")
-plt.title('{}'.format('CPU results'))
diff --git a/docs/demos/demo_cpu_regularisers3D.py b/docs/demos/demo_cpu_regularisers3D.py
deleted file mode 100644
index 2d2fc22..0000000
--- a/docs/demos/demo_cpu_regularisers3D.py
+++ /dev/null
@@ -1,458 +0,0 @@
-#!/usr/bin/env python3
-# -*- coding: utf-8 -*-
-"""
-Created on Thu Feb 22 11:39:43 2018
-
-Demonstration of 3D CPU regularisers 
-
-@authors: Daniil Kazantsev, Edoardo Pasca
-"""
-
-import matplotlib.pyplot as plt
-import numpy as np
-import os
-import timeit
-from ccpi.filters.regularisers import ROF_TV, FGP_TV, SB_TV, TGV, LLT_ROF, FGP_dTV, NDF, Diff4th
-from qualitymetrics import rmse
-###############################################################################
-def printParametersToString(pars):
-        txt = r''
-        for key, value in pars.items():
-            if key== 'algorithm' :
-                txt += "{0} = {1}".format(key, value.__name__)
-            elif key == 'input':
-                txt += "{0} = {1}".format(key, np.shape(value))
-            elif key == 'refdata':
-                txt += "{0} = {1}".format(key, np.shape(value))
-            else:
-                txt += "{0} = {1}".format(key, value)
-            txt += '\n'
-        return txt
-###############################################################################
-#%%
-filename = os.path.join(".." , ".." , ".." , "data" ,"lena_gray_512.tif")
-
-# read image
-Im = plt.imread(filename)
-Im = np.asarray(Im, dtype='float32')
-
-Im = Im/255
-perc = 0.05
-u0 = Im + np.random.normal(loc = 0 ,
-                                  scale = perc * Im , 
-                                  size = np.shape(Im))
-u_ref = Im + np.random.normal(loc = 0 ,
-                                  scale = 0.01 * Im , 
-                                  size = np.shape(Im))
-(N,M) = np.shape(u0)
-# map the u0 u0->u0>0
-# f = np.frompyfunc(lambda x: 0 if x < 0 else x, 1,1)
-u0 = u0.astype('float32')
-u_ref = u_ref.astype('float32')
-
-# change dims to check that modules work with non-squared images
-"""
-M = M-100
-u_ref2 = np.zeros([N,M],dtype='float32')
-u_ref2[:,0:M] = u_ref[:,0:M]
-u_ref = u_ref2
-del u_ref2
-
-u02 = np.zeros([N,M],dtype='float32')
-u02[:,0:M] = u0[:,0:M]
-u0 = u02
-del u02
-
-Im2 = np.zeros([N,M],dtype='float32')
-Im2[:,0:M] = Im[:,0:M]
-Im = Im2
-del Im2
-"""
-slices = 15
-
-noisyVol = np.zeros((slices,N,M),dtype='float32')
-noisyRef = np.zeros((slices,N,M),dtype='float32')
-idealVol = np.zeros((slices,N,M),dtype='float32')
-
-for i in range (slices):
-    noisyVol[i,:,:] = Im + np.random.normal(loc = 0 , scale = perc * Im , size = np.shape(Im))
-    noisyRef[i,:,:] = Im + np.random.normal(loc = 0 , scale = 0.01 * Im , size = np.shape(Im))
-    idealVol[i,:,:] = Im
-
-#%%
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("_______________ROF-TV (3D)_________________")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-
-## plot 
-fig = plt.figure()
-plt.suptitle('Performance of ROF-TV regulariser using the CPU')
-a=fig.add_subplot(1,2,1)
-a.set_title('Noisy 15th slice of a volume')
-imgplot = plt.imshow(noisyVol[10,:,:],cmap="gray")
-
-# set parameters
-pars = {'algorithm': ROF_TV, \
-        'input' : noisyVol,\
-        'regularisation_parameter':0.04,\
-        'number_of_iterations': 500,\
-        'time_marching_parameter': 0.0025
-        }
-print ("#############ROF TV CPU####################")
-start_time = timeit.default_timer()
-rof_cpu3D = ROF_TV(pars['input'],
-             pars['regularisation_parameter'],
-             pars['number_of_iterations'],
-             pars['time_marching_parameter'],'cpu')
-rms = rmse(idealVol, rof_cpu3D)
-pars['rmse'] = rms
-
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,2,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(rof_cpu3D[10,:,:], cmap="gray")
-plt.title('{}'.format('Recovered volume on the CPU using ROF-TV'))
-
-#%%
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("_______________FGP-TV (3D)__________________")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-
-## plot 
-fig = plt.figure()
-plt.suptitle('Performance of FGP-TV regulariser using the CPU')
-a=fig.add_subplot(1,2,1)
-a.set_title('Noisy Image')
-imgplot = plt.imshow(noisyVol[10,:,:],cmap="gray")
-
-# set parameters
-pars = {'algorithm' : FGP_TV, \
-        'input' : noisyVol,\
-        'regularisation_parameter':0.04, \
-        'number_of_iterations' :300 ,\
-        'tolerance_constant':0.00001,\
-        'methodTV': 0 ,\
-        'nonneg': 0 ,\
-        'printingOut': 0 
-        }
-        
-print ("#############FGP TV CPU####################")
-start_time = timeit.default_timer()
-fgp_cpu3D = FGP_TV(pars['input'], 
-              pars['regularisation_parameter'],
-              pars['number_of_iterations'],
-              pars['tolerance_constant'], 
-              pars['methodTV'],
-              pars['nonneg'],
-              pars['printingOut'],'cpu')  
-             
-             
-rms = rmse(idealVol, fgp_cpu3D)
-pars['rmse'] = rms
-
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,2,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(fgp_cpu3D[10,:,:], cmap="gray")
-plt.title('{}'.format('Recovered volume on the CPU using FGP-TV'))
-
-#%%
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("_______________SB-TV (3D)_________________")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-
-## plot 
-fig = plt.figure()
-plt.suptitle('Performance of SB-TV regulariser using the CPU')
-a=fig.add_subplot(1,2,1)
-a.set_title('Noisy Image')
-imgplot = plt.imshow(noisyVol[10,:,:],cmap="gray")
-
-# set parameters
-pars = {'algorithm' : SB_TV, \
-        'input' : noisyVol,\
-        'regularisation_parameter':0.04, \
-        'number_of_iterations' :150 ,\
-        'tolerance_constant':0.00001,\
-        'methodTV': 0 ,\
-        'printingOut': 0 
-        }
-        
-print ("#############SB TV CPU####################")
-start_time = timeit.default_timer()
-sb_cpu3D = SB_TV(pars['input'], 
-              pars['regularisation_parameter'],
-              pars['number_of_iterations'],
-              pars['tolerance_constant'], 
-              pars['methodTV'],
-              pars['printingOut'],'cpu')
-             
-rms = rmse(idealVol, sb_cpu3D)
-pars['rmse'] = rms
-
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,2,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(sb_cpu3D[10,:,:], cmap="gray")
-plt.title('{}'.format('Recovered volume on the CPU using SB-TV'))
-
-#%%
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("_______________LLT-ROF (3D)_________________")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-
-## plot 
-fig = plt.figure()
-plt.suptitle('Performance of LLT-ROF regulariser using the CPU')
-a=fig.add_subplot(1,2,1)
-a.set_title('Noisy Image')
-imgplot = plt.imshow(noisyVol[10,:,:],cmap="gray")
-
-# set parameters
-pars = {'algorithm' : LLT_ROF, \
-        'input' : noisyVol,\
-        'regularisation_parameterROF':0.04, \
-        'regularisation_parameterLLT':0.015, \
-        'number_of_iterations' :300 ,\
-        'time_marching_parameter' :0.0025 ,\
-        }
-
-print ("#############LLT ROF CPU####################")
-start_time = timeit.default_timer()
-lltrof_cpu3D = LLT_ROF(pars['input'], 
-              pars['regularisation_parameterROF'],
-              pars['regularisation_parameterLLT'],
-              pars['number_of_iterations'],
-              pars['time_marching_parameter'],'cpu')
-
-rms = rmse(idealVol, lltrof_cpu3D)
-pars['rmse'] = rms
-
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,2,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(lltrof_cpu3D[10,:,:], cmap="gray")
-plt.title('{}'.format('Recovered volume on the CPU using LLT-ROF'))
-
-#%%
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("_______________TGV (3D)_________________")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-
-## plot 
-fig = plt.figure()
-plt.suptitle('Performance of TGV regulariser using the CPU')
-a=fig.add_subplot(1,2,1)
-a.set_title('Noisy Image')
-imgplot = plt.imshow(noisyVol[10,:,:],cmap="gray")
-
-# set parameters
-pars = {'algorithm' : TGV, \
-        'input' : noisyVol,\
-        'regularisation_parameter':0.04, \
-        'alpha1':1.0,\
-        'alpha0':2.0,\
-        'number_of_iterations' :250 ,\
-        'LipshitzConstant' :12 ,\
-        }
-
-print ("#############TGV CPU####################")
-start_time = timeit.default_timer()
-tgv_cpu3D = TGV(pars['input'], 
-              pars['regularisation_parameter'],
-              pars['alpha1'],
-              pars['alpha0'],
-              pars['number_of_iterations'],
-              pars['LipshitzConstant'],'cpu')
-             
-
-rms = rmse(idealVol, tgv_cpu3D)
-pars['rmse'] = rms
-
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,2,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(tgv_cpu3D[10,:,:], cmap="gray")
-plt.title('{}'.format('Recovered volume on the CPU using TGV'))
-
-#%%
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("________________NDF (3D)___________________")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-
-## plot 
-fig = plt.figure()
-plt.suptitle('Performance of NDF regulariser using the CPU')
-a=fig.add_subplot(1,2,1)
-a.set_title('Noisy volume')
-imgplot = plt.imshow(noisyVol[10,:,:],cmap="gray")
-
-# set parameters
-pars = {'algorithm' : NDF, \
-        'input' : noisyVol,\
-        'regularisation_parameter':0.025, \
-        'edge_parameter':0.015,\
-        'number_of_iterations' :500 ,\
-        'time_marching_parameter':0.025,\
-        'penalty_type':  1
-        }
-        
-print ("#############NDF CPU################")
-start_time = timeit.default_timer()
-ndf_cpu3D = NDF(pars['input'], 
-              pars['regularisation_parameter'],
-              pars['edge_parameter'], 
-              pars['number_of_iterations'],
-              pars['time_marching_parameter'], 
-              pars['penalty_type'])  
-             
-rms = rmse(idealVol, ndf_cpu3D)
-pars['rmse'] = rms
-
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,2,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(ndf_cpu3D[10,:,:], cmap="gray")
-plt.title('{}'.format('Recovered volume on the CPU using NDF iterations'))
-
-#%%
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("___Anisotropic Diffusion 4th Order (2D)____")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-
-## plot 
-fig = plt.figure()
-plt.suptitle('Performance of Diff4th regulariser using the CPU')
-a=fig.add_subplot(1,2,1)
-a.set_title('Noisy volume')
-imgplot = plt.imshow(noisyVol[10,:,:],cmap="gray")
-
-# set parameters
-pars = {'algorithm' : Diff4th, \
-        'input' : noisyVol,\
-        'regularisation_parameter':3.5, \
-        'edge_parameter':0.02,\
-        'number_of_iterations' :300 ,\
-        'time_marching_parameter':0.0015
-        }
-        
-print ("#############Diff4th CPU################")
-start_time = timeit.default_timer()
-diff4th_cpu3D = Diff4th(pars['input'], 
-              pars['regularisation_parameter'],
-              pars['edge_parameter'], 
-              pars['number_of_iterations'],
-              pars['time_marching_parameter'])  
-             
-rms = rmse(idealVol, diff4th_cpu3D)
-pars['rmse'] = rms
-
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,2,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(diff4th_cpu3D[10,:,:], cmap="gray")
-plt.title('{}'.format('Recovered volume on the CPU using DIFF4th iterations'))
-
-#%%
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("_______________FGP-dTV (3D)__________________")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-
-## plot 
-fig = plt.figure()
-plt.suptitle('Performance of FGP-dTV regulariser using the CPU')
-a=fig.add_subplot(1,2,1)
-a.set_title('Noisy Image')
-imgplot = plt.imshow(noisyVol[10,:,:],cmap="gray")
-
-# set parameters
-pars = {'algorithm' : FGP_dTV,\
-        'input' : noisyVol,\
-        'refdata' : noisyRef,\
-        'regularisation_parameter':0.04, \
-        'number_of_iterations' :300 ,\
-        'tolerance_constant':0.00001,\
-        'eta_const':0.2,\
-        'methodTV': 0 ,\
-        'nonneg': 0 ,\
-        'printingOut': 0 
-        }
-        
-print ("#############FGP dTV CPU####################")
-start_time = timeit.default_timer()
-fgp_dTV_cpu3D = FGP_dTV(pars['input'],
-              pars['refdata'], 
-              pars['regularisation_parameter'],
-              pars['number_of_iterations'],
-              pars['tolerance_constant'], 
-              pars['eta_const'],
-              pars['methodTV'],
-              pars['nonneg'],
-              pars['printingOut'],'cpu')
-             
-             
-rms = rmse(idealVol, fgp_dTV_cpu3D)
-pars['rmse'] = rms
-
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,2,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(fgp_dTV_cpu3D[10,:,:], cmap="gray")
-plt.title('{}'.format('Recovered volume on the CPU using FGP-dTV'))
-#%%
diff --git a/docs/demos/demo_cpu_vs_gpu_regularisers.py b/docs/demos/demo_cpu_vs_gpu_regularisers.py
deleted file mode 100644
index 230a761..0000000
--- a/docs/demos/demo_cpu_vs_gpu_regularisers.py
+++ /dev/null
@@ -1,790 +0,0 @@
-#!/usr/bin/env python3
-# -*- coding: utf-8 -*-
-"""
-Created on Thu Feb 22 11:39:43 2018
-
-Demonstration of CPU implementation against the GPU one
-
-@authors: Daniil Kazantsev, Edoardo Pasca
-"""
-
-import matplotlib.pyplot as plt
-import numpy as np
-import os
-import timeit
-from ccpi.filters.regularisers import ROF_TV, FGP_TV, SB_TV, TGV, LLT_ROF, FGP_dTV, NDF, Diff4th
-from ccpi.filters.regularisers import PatchSelect
-from qualitymetrics import rmse
-###############################################################################
-def printParametersToString(pars):
-        txt = r''
-        for key, value in pars.items():
-            if key== 'algorithm' :
-                txt += "{0} = {1}".format(key, value.__name__)
-            elif key == 'input':
-                txt += "{0} = {1}".format(key, np.shape(value))
-            elif key == 'refdata':
-                txt += "{0} = {1}".format(key, np.shape(value))
-            else:
-                txt += "{0} = {1}".format(key, value)
-            txt += '\n'
-        return txt
-###############################################################################
-
-filename = os.path.join(".." , ".." , ".." , "data" ,"lena_gray_512.tif")
-
-# read image
-Im = plt.imread(filename)                     
-Im = np.asarray(Im, dtype='float32')
-
-Im = Im/255
-perc = 0.05
-u0 = Im + np.random.normal(loc = 0 ,
-                                  scale = perc * Im , 
-                                  size = np.shape(Im))
-u_ref = Im + np.random.normal(loc = 0 ,
-                                  scale = 0.01 * Im , 
-                                  size = np.shape(Im))
-
-# map the u0 u0->u0>0
-# f = np.frompyfunc(lambda x: 0 if x < 0 else x, 1,1)
-u0 = u0.astype('float32')
-u_ref = u_ref.astype('float32')
-
-#%%
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("____________ROF-TV bench___________________")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-
-## plot 
-fig = plt.figure()
-plt.suptitle('Comparison of ROF-TV regulariser using CPU and GPU implementations')
-a=fig.add_subplot(1,4,1)
-a.set_title('Noisy Image')
-imgplot = plt.imshow(u0,cmap="gray")
-
-# set parameters
-pars = {'algorithm': ROF_TV, \
-        'input' : u0,\
-        'regularisation_parameter':0.04,\
-        'number_of_iterations': 4500,\
-        'time_marching_parameter': 0.00002
-        }
-print ("#############ROF TV CPU####################")
-start_time = timeit.default_timer()
-rof_cpu = ROF_TV(pars['input'],
-             pars['regularisation_parameter'],
-             pars['number_of_iterations'],
-             pars['time_marching_parameter'],'cpu')
-rms = rmse(Im, rof_cpu)
-pars['rmse'] = rms
-
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,4,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(rof_cpu, cmap="gray")
-plt.title('{}'.format('CPU results'))
-
-print ("##############ROF TV GPU##################")
-start_time = timeit.default_timer()
-rof_gpu = ROF_TV(pars['input'], 
-                     pars['regularisation_parameter'],
-                     pars['number_of_iterations'], 
-                     pars['time_marching_parameter'],'gpu')
-                     
-rms = rmse(Im, rof_gpu)
-pars['rmse'] = rms
-pars['algorithm'] = ROF_TV
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,4,3)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(rof_gpu, cmap="gray")
-plt.title('{}'.format('GPU results'))
-
-
-print ("--------Compare the results--------")
-tolerance = 1e-05
-diff_im = np.zeros(np.shape(rof_cpu))
-diff_im = abs(rof_cpu - rof_gpu)
-diff_im[diff_im > tolerance] = 1
-a=fig.add_subplot(1,4,4)
-imgplot = plt.imshow(diff_im, vmin=0, vmax=1, cmap="gray")
-plt.title('{}'.format('Pixels larger threshold difference'))
-if (diff_im.sum() > 1):
-    print ("Arrays do not match!")
-else:
-    print ("Arrays match")
-
-#%%
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("____________FGP-TV bench___________________")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-
-## plot 
-fig = plt.figure()
-plt.suptitle('Comparison of FGP-TV regulariser using CPU and GPU implementations')
-a=fig.add_subplot(1,4,1)
-a.set_title('Noisy Image')
-imgplot = plt.imshow(u0,cmap="gray")
-
-# set parameters
-pars = {'algorithm' : FGP_TV, \
-        'input' : u0,\
-        'regularisation_parameter':0.04, \
-        'number_of_iterations' :1200 ,\
-        'tolerance_constant':0.00001,\
-        'methodTV': 0 ,\
-        'nonneg': 0 ,\
-        'printingOut': 0 
-        }
-        
-print ("#############FGP TV CPU####################")
-start_time = timeit.default_timer()
-fgp_cpu = FGP_TV(pars['input'], 
-              pars['regularisation_parameter'],
-              pars['number_of_iterations'],
-              pars['tolerance_constant'], 
-              pars['methodTV'],
-              pars['nonneg'],
-              pars['printingOut'],'cpu')  
-             
-             
-rms = rmse(Im, fgp_cpu)
-pars['rmse'] = rms
-
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,4,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(fgp_cpu, cmap="gray")
-plt.title('{}'.format('CPU results'))
-
-
-print ("##############FGP TV GPU##################")
-start_time = timeit.default_timer()
-fgp_gpu = FGP_TV(pars['input'], 
-              pars['regularisation_parameter'],
-              pars['number_of_iterations'],
-              pars['tolerance_constant'], 
-              pars['methodTV'],
-              pars['nonneg'],
-              pars['printingOut'],'gpu')
-                                   
-rms = rmse(Im, fgp_gpu)
-pars['rmse'] = rms
-pars['algorithm'] = FGP_TV
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,4,3)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(fgp_gpu, cmap="gray")
-plt.title('{}'.format('GPU results'))
-
-
-print ("--------Compare the results--------")
-tolerance = 1e-05
-diff_im = np.zeros(np.shape(fgp_cpu))
-diff_im = abs(fgp_cpu - fgp_gpu)
-diff_im[diff_im > tolerance] = 1
-a=fig.add_subplot(1,4,4)
-imgplot = plt.imshow(diff_im, vmin=0, vmax=1, cmap="gray")
-plt.title('{}'.format('Pixels larger threshold difference'))
-if (diff_im.sum() > 1):
-    print ("Arrays do not match!")
-else:
-    print ("Arrays match")
-
-#%%
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("____________SB-TV bench___________________")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-
-## plot 
-fig = plt.figure()
-plt.suptitle('Comparison of SB-TV regulariser using CPU and GPU implementations')
-a=fig.add_subplot(1,4,1)
-a.set_title('Noisy Image')
-imgplot = plt.imshow(u0,cmap="gray")
-
-# set parameters
-pars = {'algorithm' : SB_TV, \
-        'input' : u0,\
-        'regularisation_parameter':0.04, \
-        'number_of_iterations' :150 ,\
-        'tolerance_constant':1e-05,\
-        'methodTV': 0 ,\
-        'printingOut': 0 
-        }
-        
-print ("#############SB-TV CPU####################")
-start_time = timeit.default_timer()
-sb_cpu = SB_TV(pars['input'], 
-              pars['regularisation_parameter'],
-              pars['number_of_iterations'],
-              pars['tolerance_constant'], 
-              pars['methodTV'],
-              pars['printingOut'],'cpu')  
-             
-             
-rms = rmse(Im, sb_cpu)
-pars['rmse'] = rms
-
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,4,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(sb_cpu, cmap="gray")
-plt.title('{}'.format('CPU results'))
-
-
-print ("##############SB TV GPU##################")
-start_time = timeit.default_timer()
-sb_gpu = SB_TV(pars['input'], 
-              pars['regularisation_parameter'],
-              pars['number_of_iterations'],
-              pars['tolerance_constant'], 
-              pars['methodTV'],
-              pars['printingOut'],'gpu')
-                                   
-rms = rmse(Im, sb_gpu)
-pars['rmse'] = rms
-pars['algorithm'] = SB_TV
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,4,3)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(sb_gpu, cmap="gray")
-plt.title('{}'.format('GPU results'))
-
-print ("--------Compare the results--------")
-tolerance = 1e-05
-diff_im = np.zeros(np.shape(sb_cpu))
-diff_im = abs(sb_cpu - sb_gpu)
-diff_im[diff_im > tolerance] = 1
-a=fig.add_subplot(1,4,4)
-imgplot = plt.imshow(diff_im, vmin=0, vmax=1, cmap="gray")
-plt.title('{}'.format('Pixels larger threshold difference'))
-if (diff_im.sum() > 1):
-    print ("Arrays do not match!")
-else:
-    print ("Arrays match")
-#%%
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("____________TGV bench___________________")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-
-## plot 
-fig = plt.figure()
-plt.suptitle('Comparison of TGV regulariser using CPU and GPU implementations')
-a=fig.add_subplot(1,4,1)
-a.set_title('Noisy Image')
-imgplot = plt.imshow(u0,cmap="gray")
-
-# set parameters
-pars = {'algorithm' : TGV, \
-        'input' : u0,\
-        'regularisation_parameter':0.04, \
-        'alpha1':1.0,\
-        'alpha0':2.0,\
-        'number_of_iterations' :400 ,\
-        'LipshitzConstant' :12 ,\
-        }
-        
-print ("#############TGV CPU####################")
-start_time = timeit.default_timer()
-tgv_cpu = TGV(pars['input'], 
-              pars['regularisation_parameter'],
-              pars['alpha1'],
-              pars['alpha0'],
-              pars['number_of_iterations'],
-              pars['LipshitzConstant'],'cpu')
-             
-rms = rmse(Im, tgv_cpu)
-pars['rmse'] = rms
-
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,4,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(tgv_cpu, cmap="gray")
-plt.title('{}'.format('CPU results'))
-
-print ("##############TGV GPU##################")
-start_time = timeit.default_timer()
-tgv_gpu = TGV(pars['input'], 
-              pars['regularisation_parameter'],
-              pars['alpha1'],
-              pars['alpha0'],
-              pars['number_of_iterations'],
-              pars['LipshitzConstant'],'gpu')
-                                   
-rms = rmse(Im, tgv_gpu)
-pars['rmse'] = rms
-pars['algorithm'] = TGV
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,4,3)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(tgv_gpu, cmap="gray")
-plt.title('{}'.format('GPU results'))
-
-print ("--------Compare the results--------")
-tolerance = 1e-05
-diff_im = np.zeros(np.shape(tgv_gpu))
-diff_im = abs(tgv_cpu - tgv_gpu)
-diff_im[diff_im > tolerance] = 1
-a=fig.add_subplot(1,4,4)
-imgplot = plt.imshow(diff_im, vmin=0, vmax=1, cmap="gray")
-plt.title('{}'.format('Pixels larger threshold difference'))
-if (diff_im.sum() > 1):
-    print ("Arrays do not match!")
-else:
-    print ("Arrays match")
-#%%
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("____________LLT-ROF bench___________________")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-
-## plot 
-fig = plt.figure()
-plt.suptitle('Comparison of LLT-ROF regulariser using CPU and GPU implementations')
-a=fig.add_subplot(1,4,1)
-a.set_title('Noisy Image')
-imgplot = plt.imshow(u0,cmap="gray")
-
-# set parameters
-pars = {'algorithm' : LLT_ROF, \
-        'input' : u0,\
-        'regularisation_parameterROF':0.04, \
-        'regularisation_parameterLLT':0.01, \
-        'number_of_iterations' :4500 ,\
-        'time_marching_parameter' :0.00002 ,\
-        }
-        
-print ("#############LLT- ROF CPU####################")
-start_time = timeit.default_timer()
-lltrof_cpu = LLT_ROF(pars['input'], 
-              pars['regularisation_parameterROF'],
-              pars['regularisation_parameterLLT'],
-              pars['number_of_iterations'],
-              pars['time_marching_parameter'],'cpu')
-
-rms = rmse(Im, lltrof_cpu)
-pars['rmse'] = rms
-
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,4,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(lltrof_cpu, cmap="gray")
-plt.title('{}'.format('CPU results'))
-
-print ("#############LLT- ROF GPU####################")
-start_time = timeit.default_timer()
-lltrof_gpu = LLT_ROF(pars['input'], 
-              pars['regularisation_parameterROF'],
-              pars['regularisation_parameterLLT'],
-              pars['number_of_iterations'],
-              pars['time_marching_parameter'],'gpu')
-
-rms = rmse(Im, lltrof_gpu)
-pars['rmse'] = rms
-pars['algorithm'] = LLT_ROF
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,4,3)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(lltrof_gpu, cmap="gray")
-plt.title('{}'.format('GPU results'))
-
-print ("--------Compare the results--------")
-tolerance = 1e-05
-diff_im = np.zeros(np.shape(lltrof_gpu))
-diff_im = abs(lltrof_cpu - lltrof_gpu)
-diff_im[diff_im > tolerance] = 1
-a=fig.add_subplot(1,4,4)
-imgplot = plt.imshow(diff_im, vmin=0, vmax=1, cmap="gray")
-plt.title('{}'.format('Pixels larger threshold difference'))
-if (diff_im.sum() > 1):
-    print ("Arrays do not match!")
-else:
-    print ("Arrays match")
-#%%
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("_______________NDF bench___________________")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-
-## plot 
-fig = plt.figure()
-plt.suptitle('Comparison of NDF regulariser using CPU and GPU implementations')
-a=fig.add_subplot(1,4,1)
-a.set_title('Noisy Image')
-imgplot = plt.imshow(u0,cmap="gray")
-
-# set parameters
-pars = {'algorithm' : NDF, \
-        'input' : u0,\
-        'regularisation_parameter':0.06, \
-        'edge_parameter':0.04,\
-        'number_of_iterations' :1000 ,\
-        'time_marching_parameter':0.025,\
-        'penalty_type':  1
-        }
-        
-print ("#############NDF CPU####################")
-start_time = timeit.default_timer()
-ndf_cpu = NDF(pars['input'], 
-              pars['regularisation_parameter'],
-              pars['edge_parameter'], 
-              pars['number_of_iterations'],
-              pars['time_marching_parameter'], 
-              pars['penalty_type'],'cpu')
-             
-rms = rmse(Im, ndf_cpu)
-pars['rmse'] = rms
-
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,4,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(ndf_cpu, cmap="gray")
-plt.title('{}'.format('CPU results'))
-
-
-print ("##############NDF GPU##################")
-start_time = timeit.default_timer()
-ndf_gpu = NDF(pars['input'], 
-              pars['regularisation_parameter'],
-              pars['edge_parameter'], 
-              pars['number_of_iterations'],
-              pars['time_marching_parameter'], 
-              pars['penalty_type'],'gpu')
-             
-rms = rmse(Im, ndf_gpu)
-pars['rmse'] = rms
-pars['algorithm'] = NDF
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,4,3)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(ndf_gpu, cmap="gray")
-plt.title('{}'.format('GPU results'))
-
-print ("--------Compare the results--------")
-tolerance = 1e-05
-diff_im = np.zeros(np.shape(ndf_cpu))
-diff_im = abs(ndf_cpu - ndf_gpu)
-diff_im[diff_im > tolerance] = 1
-a=fig.add_subplot(1,4,4)
-imgplot = plt.imshow(diff_im, vmin=0, vmax=1, cmap="gray")
-plt.title('{}'.format('Pixels larger threshold difference'))
-if (diff_im.sum() > 1):
-    print ("Arrays do not match!")
-else:
-    print ("Arrays match")
-
-#%%
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("___Anisotropic Diffusion 4th Order (2D)____")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-
-## plot 
-fig = plt.figure()
-plt.suptitle('Comparison of Diff4th regulariser using CPU and GPU implementations')
-a=fig.add_subplot(1,4,1)
-a.set_title('Noisy Image')
-imgplot = plt.imshow(u0,cmap="gray")
-
-# set parameters
-pars = {'algorithm' : Diff4th, \
-        'input' : u0,\
-        'regularisation_parameter':3.5, \
-        'edge_parameter':0.02,\
-        'number_of_iterations' :500 ,\
-        'time_marching_parameter':0.001
-        }
-
-print ("#############Diff4th CPU####################")
-start_time = timeit.default_timer()
-diff4th_cpu = Diff4th(pars['input'], 
-              pars['regularisation_parameter'],
-              pars['edge_parameter'], 
-              pars['number_of_iterations'],
-              pars['time_marching_parameter'],'cpu')
-             
-rms = rmse(Im, diff4th_cpu)
-pars['rmse'] = rms
-
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,4,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(diff4th_cpu, cmap="gray")
-plt.title('{}'.format('CPU results'))
-
-print ("##############Diff4th GPU##################")
-start_time = timeit.default_timer()
-diff4th_gpu = Diff4th(pars['input'], 
-              pars['regularisation_parameter'],
-              pars['edge_parameter'], 
-              pars['number_of_iterations'],
-              pars['time_marching_parameter'], 'gpu')
-             
-rms = rmse(Im, diff4th_gpu)
-pars['rmse'] = rms
-pars['algorithm'] = Diff4th
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,4,3)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(diff4th_gpu, cmap="gray")
-plt.title('{}'.format('GPU results'))
-
-print ("--------Compare the results--------")
-tolerance = 1e-05
-diff_im = np.zeros(np.shape(diff4th_cpu))
-diff_im = abs(diff4th_cpu - diff4th_gpu)
-diff_im[diff_im > tolerance] = 1
-a=fig.add_subplot(1,4,4)
-imgplot = plt.imshow(diff_im, vmin=0, vmax=1, cmap="gray")
-plt.title('{}'.format('Pixels larger threshold difference'))
-if (diff_im.sum() > 1):
-    print ("Arrays do not match!")
-else:
-    print ("Arrays match")
-
-#%%
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("____________FGP-dTV bench___________________")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-
-## plot 
-fig = plt.figure()
-plt.suptitle('Comparison of FGP-dTV regulariser using CPU and GPU implementations')
-a=fig.add_subplot(1,4,1)
-a.set_title('Noisy Image')
-imgplot = plt.imshow(u0,cmap="gray")
-
-# set parameters
-pars = {'algorithm' : FGP_dTV, \
-        'input' : u0,\
-        'refdata' : u_ref,\
-        'regularisation_parameter':0.04, \
-        'number_of_iterations' :1000 ,\
-        'tolerance_constant':1e-07,\
-        'eta_const':0.2,\
-        'methodTV': 0 ,\
-        'nonneg': 0 ,\
-        'printingOut': 0 
-        }
-        
-print ("#############FGP dTV CPU####################")
-start_time = timeit.default_timer()
-fgp_dtv_cpu = FGP_dTV(pars['input'], 
-              pars['refdata'], 
-              pars['regularisation_parameter'],
-              pars['number_of_iterations'],
-              pars['tolerance_constant'], 
-              pars['eta_const'], 
-              pars['methodTV'],
-              pars['nonneg'],
-              pars['printingOut'],'cpu')
-             
-             
-rms = rmse(Im, fgp_dtv_cpu)
-pars['rmse'] = rms
-
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,4,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(fgp_dtv_cpu, cmap="gray")
-plt.title('{}'.format('CPU results'))
-
-print ("##############FGP dTV GPU##################")
-start_time = timeit.default_timer()
-fgp_dtv_gpu = FGP_dTV(pars['input'], 
-              pars['refdata'], 
-              pars['regularisation_parameter'],
-              pars['number_of_iterations'],
-              pars['tolerance_constant'], 
-              pars['eta_const'], 
-              pars['methodTV'],
-              pars['nonneg'],
-              pars['printingOut'],'gpu')
-rms = rmse(Im, fgp_dtv_gpu)
-pars['rmse'] = rms
-pars['algorithm'] = FGP_dTV
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,4,3)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(fgp_dtv_gpu, cmap="gray")
-plt.title('{}'.format('GPU results'))
-
-
-print ("--------Compare the results--------")
-tolerance = 1e-05
-diff_im = np.zeros(np.shape(fgp_dtv_cpu))
-diff_im = abs(fgp_dtv_cpu - fgp_dtv_gpu)
-diff_im[diff_im > tolerance] = 1
-a=fig.add_subplot(1,4,4)
-imgplot = plt.imshow(diff_im, vmin=0, vmax=1, cmap="gray")
-plt.title('{}'.format('Pixels larger threshold difference'))
-if (diff_im.sum() > 1):
-    print ("Arrays do not match!")
-else:
-    print ("Arrays match")
-#%%
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("____Non-local regularisation bench_________")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-
-## plot 
-fig = plt.figure()
-plt.suptitle('Comparison of Nonlocal TV regulariser using CPU and GPU implementations')
-a=fig.add_subplot(1,2,1)
-a.set_title('Noisy Image')
-imgplot = plt.imshow(u0,cmap="gray")
-
-pars = {'algorithm' : PatchSelect, \
-        'input' : u0,\
-        'searchwindow': 7, \
-        'patchwindow': 2,\
-        'neighbours' : 15 ,\
-        'edge_parameter':0.18}
-
-print ("############## Nonlocal Patches on CPU##################")
-start_time = timeit.default_timer()
-H_i, H_j, WeightsCPU = PatchSelect(pars['input'], 
-              pars['searchwindow'],
-              pars['patchwindow'], 
-              pars['neighbours'],
-              pars['edge_parameter'],'cpu')
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-
-print ("############## Nonlocal Patches on GPU##################")
-start_time = timeit.default_timer()
-start_time = timeit.default_timer()
-H_i, H_j, WeightsGPU = PatchSelect(pars['input'], 
-              pars['searchwindow'],
-              pars['patchwindow'], 
-              pars['neighbours'],
-              pars['edge_parameter'],'gpu')
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-
-print ("--------Compare the results--------")
-tolerance = 1e-05
-diff_im = np.zeros(np.shape(u0))
-diff_im = abs(WeightsCPU[0,:,:] - WeightsGPU[0,:,:])
-diff_im[diff_im > tolerance] = 1
-a=fig.add_subplot(1,2,2)
-imgplot = plt.imshow(diff_im, vmin=0, vmax=1, cmap="gray")
-plt.title('{}'.format('Pixels larger threshold difference'))
-if (diff_im.sum() > 1):
-    print ("Arrays do not match!")
-else:
-    print ("Arrays match")
-#%%
\ No newline at end of file
diff --git a/docs/demos/demo_gpu_regularisers.py b/docs/demos/demo_gpu_regularisers.py
deleted file mode 100644
index e1c6575..0000000
--- a/docs/demos/demo_gpu_regularisers.py
+++ /dev/null
@@ -1,518 +0,0 @@
-#!/usr/bin/env python3
-# -*- coding: utf-8 -*-
-"""
-Created on Thu Feb 22 11:39:43 2018
-
-Demonstration of GPU regularisers
-
-@authors: Daniil Kazantsev, Edoardo Pasca
-"""
-
-import matplotlib.pyplot as plt
-import numpy as np
-import os
-import timeit
-from ccpi.filters.regularisers import ROF_TV, FGP_TV, SB_TV, TGV, LLT_ROF, FGP_dTV, NDF, Diff4th
-from ccpi.filters.regularisers import PatchSelect, NLTV
-from qualitymetrics import rmse
-###############################################################################
-def printParametersToString(pars):
-        txt = r''
-        for key, value in pars.items():
-            if key== 'algorithm' :
-                txt += "{0} = {1}".format(key, value.__name__)
-            elif key == 'input':
-                txt += "{0} = {1}".format(key, np.shape(value))
-            elif key == 'refdata':
-                txt += "{0} = {1}".format(key, np.shape(value))
-            else:
-                txt += "{0} = {1}".format(key, value)
-            txt += '\n'
-        return txt
-###############################################################################
-#%%
-filename = os.path.join(".." , ".." , ".." , "data" ,"lena_gray_512.tif")
-
-# read image
-Im = plt.imread(filename)                     
-Im = np.asarray(Im, dtype='float32')
-
-Im = Im/255
-perc = 0.05
-u0 = Im + np.random.normal(loc = 0 ,
-                                  scale = perc * Im , 
-                                  size = np.shape(Im))
-u_ref = Im + np.random.normal(loc = 0 ,
-                                  scale = 0.01 * Im , 
-                                  size = np.shape(Im))
-(N,M) = np.shape(u0)
-# map the u0 u0->u0>0
-# f = np.frompyfunc(lambda x: 0 if x < 0 else x, 1,1)
-u0 = u0.astype('float32')
-u_ref = u_ref.astype('float32')
-"""
-M = M-100
-u_ref2 = np.zeros([N,M],dtype='float32')
-u_ref2[:,0:M] = u_ref[:,0:M]
-u_ref = u_ref2
-del u_ref2
-
-u02 = np.zeros([N,M],dtype='float32')
-u02[:,0:M] = u0[:,0:M]
-u0 = u02
-del u02
-
-Im2 = np.zeros([N,M],dtype='float32')
-Im2[:,0:M] = Im[:,0:M]
-Im = Im2
-del Im2
-"""
-#%%
-
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("____________ROF-TV regulariser_____________")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-
-## plot 
-fig = plt.figure()
-plt.suptitle('Performance of the ROF-TV regulariser using the GPU')
-a=fig.add_subplot(1,2,1)
-a.set_title('Noisy Image')
-imgplot = plt.imshow(u0,cmap="gray")
-
-# set parameters
-pars = {'algorithm': ROF_TV, \
-        'input' : u0,\
-        'regularisation_parameter':0.04,\
-        'number_of_iterations': 1200,\
-        'time_marching_parameter': 0.0025
-        }
-print ("##############ROF TV GPU##################")
-start_time = timeit.default_timer()
-rof_gpu = ROF_TV(pars['input'], 
-                     pars['regularisation_parameter'],
-                     pars['number_of_iterations'], 
-                     pars['time_marching_parameter'],'gpu')
-                     
-rms = rmse(Im, rof_gpu)
-pars['rmse'] = rms
-pars['algorithm'] = ROF_TV
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,2,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(rof_gpu, cmap="gray")
-plt.title('{}'.format('GPU results'))
-
-#%%
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("____________FGP-TV regulariser_____________")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-
-## plot 
-fig = plt.figure()
-plt.suptitle('Performance of the FGP-TV regulariser using the GPU')
-a=fig.add_subplot(1,2,1)
-a.set_title('Noisy Image')
-imgplot = plt.imshow(u0,cmap="gray")
-
-# set parameters
-pars = {'algorithm' : FGP_TV, \
-        'input' : u0,\
-        'regularisation_parameter':0.04, \
-        'number_of_iterations' :1200 ,\
-        'tolerance_constant':1e-06,\
-        'methodTV': 0 ,\
-        'nonneg': 0 ,\
-        'printingOut': 0 
-        }
-
-print ("##############FGP TV GPU##################")
-start_time = timeit.default_timer()
-fgp_gpu = FGP_TV(pars['input'], 
-              pars['regularisation_parameter'],
-              pars['number_of_iterations'],
-              pars['tolerance_constant'], 
-              pars['methodTV'],
-              pars['nonneg'],
-              pars['printingOut'],'gpu')
-                                   
-rms = rmse(Im, fgp_gpu)
-pars['rmse'] = rms
-pars['algorithm'] = FGP_TV
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,2,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(fgp_gpu, cmap="gray")
-plt.title('{}'.format('GPU results'))
-
-#%%
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("____________SB-TV regulariser______________")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-
-## plot 
-fig = plt.figure()
-plt.suptitle('Performance of the SB-TV regulariser using the GPU')
-a=fig.add_subplot(1,2,1)
-a.set_title('Noisy Image')
-imgplot = plt.imshow(u0,cmap="gray")
-
-# set parameters
-pars = {'algorithm' : SB_TV, \
-        'input' : u0,\
-        'regularisation_parameter':0.04, \
-        'number_of_iterations' :150 ,\
-        'tolerance_constant':1e-06,\
-        'methodTV': 0 ,\
-        'printingOut': 0 
-        }
-
-print ("##############SB TV GPU##################")
-start_time = timeit.default_timer()
-sb_gpu = SB_TV(pars['input'], 
-              pars['regularisation_parameter'],
-              pars['number_of_iterations'],
-              pars['tolerance_constant'], 
-              pars['methodTV'],
-              pars['printingOut'],'gpu')
-                                   
-rms = rmse(Im, sb_gpu)
-pars['rmse'] = rms
-pars['algorithm'] = SB_TV
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,2,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(sb_gpu, cmap="gray")
-plt.title('{}'.format('GPU results'))
-#%%
-
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("_____Total Generalised Variation (2D)______")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-
-## plot 
-fig = plt.figure()
-plt.suptitle('Performance of TGV regulariser using the GPU')
-a=fig.add_subplot(1,2,1)
-a.set_title('Noisy Image')
-imgplot = plt.imshow(u0,cmap="gray")
-
-# set parameters
-pars = {'algorithm' : TGV, \
-        'input' : u0,\
-        'regularisation_parameter':0.04, \
-        'alpha1':1.0,\
-        'alpha0':2.0,\
-        'number_of_iterations' :1250 ,\
-        'LipshitzConstant' :12 ,\
-        }
-        
-print ("#############TGV CPU####################")
-start_time = timeit.default_timer()
-tgv_gpu = TGV(pars['input'], 
-              pars['regularisation_parameter'],
-              pars['alpha1'],
-              pars['alpha0'],
-              pars['number_of_iterations'],
-              pars['LipshitzConstant'],'gpu')  
-             
-             
-rms = rmse(Im, tgv_gpu)
-pars['rmse'] = rms
-
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,2,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(tgv_gpu, cmap="gray")
-plt.title('{}'.format('GPU results'))
-
-#%%
-
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("______________LLT- ROF (2D)________________")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-
-## plot 
-fig = plt.figure()
-plt.suptitle('Performance of LLT-ROF regulariser using the GPU')
-a=fig.add_subplot(1,2,1)
-a.set_title('Noisy Image')
-imgplot = plt.imshow(u0,cmap="gray")
-
-# set parameters
-pars = {'algorithm' : LLT_ROF, \
-        'input' : u0,\
-        'regularisation_parameterROF':0.04, \
-        'regularisation_parameterLLT':0.01, \
-        'number_of_iterations' :500 ,\
-        'time_marching_parameter' :0.0025 ,\
-        }
-        
-print ("#############LLT- ROF GPU####################")
-start_time = timeit.default_timer()
-lltrof_gpu = LLT_ROF(pars['input'], 
-              pars['regularisation_parameterROF'],
-              pars['regularisation_parameterLLT'],
-              pars['number_of_iterations'],
-              pars['time_marching_parameter'],'gpu')
-             
-             
-rms = rmse(Im, lltrof_gpu)
-pars['rmse'] = rms
-
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,2,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(lltrof_gpu, cmap="gray")
-plt.title('{}'.format('GPU results'))
-
-#%%
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("_______________NDF regulariser_____________")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-
-## plot 
-fig = plt.figure()
-plt.suptitle('Performance of the NDF regulariser using the GPU')
-a=fig.add_subplot(1,2,1)
-a.set_title('Noisy Image')
-imgplot = plt.imshow(u0,cmap="gray")
-
-# set parameters
-pars = {'algorithm' : NDF, \
-        'input' : u0,\
-        'regularisation_parameter':0.025, \
-        'edge_parameter':0.015,\
-        'number_of_iterations' :500 ,\
-        'time_marching_parameter':0.025,\
-        'penalty_type':  1
-        }
-
-print ("##############NDF GPU##################")
-start_time = timeit.default_timer()
-ndf_gpu = NDF(pars['input'], 
-              pars['regularisation_parameter'],
-              pars['edge_parameter'], 
-              pars['number_of_iterations'],
-              pars['time_marching_parameter'], 
-              pars['penalty_type'],'gpu')  
-             
-rms = rmse(Im, ndf_gpu)
-pars['rmse'] = rms
-pars['algorithm'] = NDF
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,2,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(ndf_gpu, cmap="gray")
-plt.title('{}'.format('GPU results'))
-
-#%%
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("___Anisotropic Diffusion 4th Order (2D)____")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-
-## plot 
-fig = plt.figure()
-plt.suptitle('Performance of Diff4th regulariser using the GPU')
-a=fig.add_subplot(1,2,1)
-a.set_title('Noisy Image')
-imgplot = plt.imshow(u0,cmap="gray")
-
-# set parameters
-pars = {'algorithm' : Diff4th, \
-        'input' : u0,\
-        'regularisation_parameter':3.5, \
-        'edge_parameter':0.02,\
-        'number_of_iterations' :500 ,\
-        'time_marching_parameter':0.0015
-        }
-        
-print ("#############DIFF4th CPU################")
-start_time = timeit.default_timer()
-diff4_gpu = Diff4th(pars['input'], 
-              pars['regularisation_parameter'],
-              pars['edge_parameter'], 
-              pars['number_of_iterations'],
-              pars['time_marching_parameter'],'gpu')
-             
-rms = rmse(Im, diff4_gpu)
-pars['rmse'] = rms
-
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,2,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(diff4_gpu, cmap="gray")
-plt.title('{}'.format('GPU results'))
-
-#%%
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("___Nonlocal patches pre-calculation____")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-start_time = timeit.default_timer()
-# set parameters
-pars = {'algorithm' : PatchSelect, \
-        'input' : u0,\
-        'searchwindow': 7, \
-        'patchwindow': 2,\
-        'neighbours' : 15 ,\
-        'edge_parameter':0.18}
-
-H_i, H_j, Weights = PatchSelect(pars['input'], 
-              pars['searchwindow'],
-              pars['patchwindow'], 
-              pars['neighbours'],
-              pars['edge_parameter'],'gpu')
-              
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-"""
-plt.figure()
-plt.imshow(Weights[0,:,:],cmap="gray",interpolation="nearest",vmin=0, vmax=1)
-plt.show()
-"""
-#%%
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("___Nonlocal Total Variation penalty____")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-## plot 
-fig = plt.figure()
-plt.suptitle('Performance of NLTV regulariser using the CPU')
-a=fig.add_subplot(1,2,1)
-a.set_title('Noisy Image')
-imgplot = plt.imshow(u0,cmap="gray")
-
-pars2 = {'algorithm' : NLTV, \
-        'input' : u0,\
-        'H_i': H_i, \
-        'H_j': H_j,\
-        'H_k' : 0,\
-        'Weights' : Weights,\
-        'regularisation_parameter': 0.02,\
-        'iterations': 3
-        }
-start_time = timeit.default_timer()
-nltv_cpu = NLTV(pars2['input'], 
-              pars2['H_i'],
-              pars2['H_j'], 
-              pars2['H_k'],
-              pars2['Weights'],
-              pars2['regularisation_parameter'],
-              pars2['iterations'])
-
-rms = rmse(Im, nltv_cpu)
-pars['rmse'] = rms
-
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,2,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(nltv_cpu, cmap="gray")
-plt.title('{}'.format('CPU results'))
-#%%
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("____________FGP-dTV bench___________________")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-
-## plot 
-fig = plt.figure()
-plt.suptitle('Performance of the FGP-dTV regulariser using the GPU')
-a=fig.add_subplot(1,2,1)
-a.set_title('Noisy Image')
-imgplot = plt.imshow(u0,cmap="gray")
-
-# set parameters
-pars = {'algorithm' : FGP_dTV, \
-        'input' : u0,\
-        'refdata' : u_ref,\
-        'regularisation_parameter':0.04, \
-        'number_of_iterations' :2000 ,\
-        'tolerance_constant':1e-06,\
-        'eta_const':0.2,\
-        'methodTV': 0 ,\
-        'nonneg': 0 ,\
-        'printingOut': 0 
-        }
-
-print ("##############FGP dTV GPU##################")
-start_time = timeit.default_timer()
-fgp_dtv_gpu = FGP_dTV(pars['input'], 
-              pars['refdata'], 
-              pars['regularisation_parameter'],
-              pars['number_of_iterations'],
-              pars['tolerance_constant'], 
-              pars['eta_const'], 
-              pars['methodTV'],
-              pars['nonneg'],
-              pars['printingOut'],'gpu')
-                                   
-rms = rmse(Im, fgp_dtv_gpu)
-pars['rmse'] = rms
-pars['algorithm'] = FGP_dTV
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,2,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(fgp_dtv_gpu, cmap="gray")
-plt.title('{}'.format('GPU results'))
diff --git a/docs/demos/demo_gpu_regularisers3D.py b/docs/demos/demo_gpu_regularisers3D.py
deleted file mode 100644
index b6058d2..0000000
--- a/docs/demos/demo_gpu_regularisers3D.py
+++ /dev/null
@@ -1,460 +0,0 @@
-#!/usr/bin/env python3
-# -*- coding: utf-8 -*-
-"""
-Created on Thu Feb 22 11:39:43 2018
-
-Demonstration of GPU regularisers
-
-@authors: Daniil Kazantsev, Edoardo Pasca
-"""
-
-import matplotlib.pyplot as plt
-import numpy as np
-import os
-import timeit
-from ccpi.filters.regularisers import ROF_TV, FGP_TV, SB_TV, TGV, LLT_ROF, FGP_dTV, NDF, Diff4th
-from qualitymetrics import rmse
-###############################################################################
-def printParametersToString(pars):
-        txt = r''
-        for key, value in pars.items():
-            if key== 'algorithm' :
-                txt += "{0} = {1}".format(key, value.__name__)
-            elif key == 'input':
-                txt += "{0} = {1}".format(key, np.shape(value))
-            elif key == 'refdata':
-                txt += "{0} = {1}".format(key, np.shape(value))
-            else:
-                txt += "{0} = {1}".format(key, value)
-            txt += '\n'
-        return txt
-###############################################################################
-#%%
-filename = os.path.join(".." , ".." , ".." , "data" ,"lena_gray_512.tif")
-
-# read image
-Im = plt.imread(filename)                     
-Im = np.asarray(Im, dtype='float32')
-
-Im = Im/255
-perc = 0.05
-u0 = Im + np.random.normal(loc = 0 ,
-                                  scale = perc * Im , 
-                                  size = np.shape(Im))
-u_ref = Im + np.random.normal(loc = 0 ,
-                                  scale = 0.01 * Im , 
-                                  size = np.shape(Im))
-(N,M) = np.shape(u0)
-# map the u0 u0->u0>0
-# f = np.frompyfunc(lambda x: 0 if x < 0 else x, 1,1)
-u0 = u0.astype('float32')
-u_ref = u_ref.astype('float32')
-"""
-M = M-100
-u_ref2 = np.zeros([N,M],dtype='float32')
-u_ref2[:,0:M] = u_ref[:,0:M]
-u_ref = u_ref2
-del u_ref2
-
-u02 = np.zeros([N,M],dtype='float32')
-u02[:,0:M] = u0[:,0:M]
-u0 = u02
-del u02
-
-Im2 = np.zeros([N,M],dtype='float32')
-Im2[:,0:M] = Im[:,0:M]
-Im = Im2
-del Im2
-"""
-
-
-slices = 20
-
-filename = os.path.join(".." , ".." , ".." , "data" ,"lena_gray_512.tif")
-Im = plt.imread(filename)
-Im = np.asarray(Im, dtype='float32')
-
-Im = Im/255
-perc = 0.05
-
-noisyVol = np.zeros((slices,N,N),dtype='float32')
-noisyRef = np.zeros((slices,N,N),dtype='float32')
-idealVol = np.zeros((slices,N,N),dtype='float32')
-
-for i in range (slices):
-    noisyVol[i,:,:] = Im + np.random.normal(loc = 0 , scale = perc * Im , size = np.shape(Im))
-    noisyRef[i,:,:] = Im + np.random.normal(loc = 0 , scale = 0.01 * Im , size = np.shape(Im))
-    idealVol[i,:,:] = Im
-
-#%%
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("_______________ROF-TV (3D)_________________")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-
-## plot 
-fig = plt.figure()
-plt.suptitle('Performance of ROF-TV regulariser using the GPU')
-a=fig.add_subplot(1,2,1)
-a.set_title('Noisy 15th slice of a volume')
-imgplot = plt.imshow(noisyVol[10,:,:],cmap="gray")
-
-# set parameters
-pars = {'algorithm': ROF_TV, \
-        'input' : noisyVol,\
-        'regularisation_parameter':0.04,\
-        'number_of_iterations': 500,\
-        'time_marching_parameter': 0.0025        
-        }
-print ("#############ROF TV GPU####################")
-start_time = timeit.default_timer()
-rof_gpu3D = ROF_TV(pars['input'],
-             pars['regularisation_parameter'],
-             pars['number_of_iterations'],
-             pars['time_marching_parameter'],'gpu')
-rms = rmse(idealVol, rof_gpu3D)
-pars['rmse'] = rms
-
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,2,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(rof_gpu3D[10,:,:], cmap="gray")
-plt.title('{}'.format('Recovered volume on the GPU using ROF-TV'))
-#%%
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("_______________FGP-TV (3D)__________________")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-
-## plot 
-fig = plt.figure()
-plt.suptitle('Performance of FGP-TV regulariser using the GPU')
-a=fig.add_subplot(1,2,1)
-a.set_title('Noisy Image')
-imgplot = plt.imshow(noisyVol[10,:,:],cmap="gray")
-
-# set parameters
-pars = {'algorithm' : FGP_TV, \
-        'input' : noisyVol,\
-        'regularisation_parameter':0.04, \
-        'number_of_iterations' :300 ,\
-        'tolerance_constant':0.00001,\
-        'methodTV': 0 ,\
-        'nonneg': 0 ,\
-        'printingOut': 0 
-        }
-
-print ("#############FGP TV GPU####################")
-start_time = timeit.default_timer()
-fgp_gpu3D = FGP_TV(pars['input'], 
-              pars['regularisation_parameter'],
-              pars['number_of_iterations'],
-              pars['tolerance_constant'], 
-              pars['methodTV'],
-              pars['nonneg'],
-              pars['printingOut'],'gpu')
-
-rms = rmse(idealVol, fgp_gpu3D)
-pars['rmse'] = rms
-
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,2,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(fgp_gpu3D[10,:,:], cmap="gray")
-plt.title('{}'.format('Recovered volume on the GPU using FGP-TV'))
-
-#%%
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("_______________SB-TV (3D)__________________")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-
-## plot 
-fig = plt.figure()
-plt.suptitle('Performance of SB-TV regulariser using the GPU')
-a=fig.add_subplot(1,2,1)
-a.set_title('Noisy Image')
-imgplot = plt.imshow(noisyVol[10,:,:],cmap="gray")
-
-# set parameters
-pars = {'algorithm' : SB_TV, \
-        'input' : noisyVol,\
-        'regularisation_parameter':0.04, \
-        'number_of_iterations' :100 ,\
-        'tolerance_constant':1e-05,\
-        'methodTV': 0 ,\
-        'printingOut': 0 
-        }
-
-print ("#############SB TV GPU####################")
-start_time = timeit.default_timer()
-sb_gpu3D = SB_TV(pars['input'], 
-              pars['regularisation_parameter'],
-              pars['number_of_iterations'],
-              pars['tolerance_constant'], 
-              pars['methodTV'],
-              pars['printingOut'],'gpu')
-
-rms = rmse(idealVol, sb_gpu3D)
-pars['rmse'] = rms
-
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,2,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(sb_gpu3D[10,:,:], cmap="gray")
-plt.title('{}'.format('Recovered volume on the GPU using SB-TV'))
-#%%
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("_______________LLT-ROF (3D)_________________")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-
-## plot 
-fig = plt.figure()
-plt.suptitle('Performance of LLT-ROF regulariser using the GPU')
-a=fig.add_subplot(1,2,1)
-a.set_title('Noisy Image')
-imgplot = plt.imshow(noisyVol[10,:,:],cmap="gray")
-
-# set parameters
-pars = {'algorithm' : LLT_ROF, \
-        'input' : noisyVol,\
-        'regularisation_parameterROF':0.04, \
-        'regularisation_parameterLLT':0.015, \
-        'number_of_iterations' :300 ,\
-        'time_marching_parameter' :0.0025 ,\
-        }
-
-print ("#############LLT ROF CPU####################")
-start_time = timeit.default_timer()
-lltrof_gpu3D = LLT_ROF(pars['input'], 
-              pars['regularisation_parameterROF'],
-              pars['regularisation_parameterLLT'],
-              pars['number_of_iterations'],
-              pars['time_marching_parameter'],'gpu')
-
-rms = rmse(idealVol, lltrof_gpu3D)
-pars['rmse'] = rms
-
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,2,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(lltrof_gpu3D[10,:,:], cmap="gray")
-plt.title('{}'.format('Recovered volume on the GPU using LLT-ROF'))
-
-#%%
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("_______________TGV (3D)_________________")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-
-## plot 
-fig = plt.figure()
-plt.suptitle('Performance of TGV regulariser using the GPU')
-a=fig.add_subplot(1,2,1)
-a.set_title('Noisy Image')
-imgplot = plt.imshow(noisyVol[10,:,:],cmap="gray")
-
-# set parameters
-pars = {'algorithm' : TGV, \
-        'input' : noisyVol,\
-        'regularisation_parameter':0.04, \
-        'alpha1':1.0,\
-        'alpha0':2.0,\
-        'number_of_iterations' :600 ,\
-        'LipshitzConstant' :12 ,\
-        }
-
-print ("#############TGV GPU####################")
-start_time = timeit.default_timer()
-tgv_gpu3D = TGV(pars['input'], 
-              pars['regularisation_parameter'],
-              pars['alpha1'],
-              pars['alpha0'],
-              pars['number_of_iterations'],
-              pars['LipshitzConstant'],'gpu')
-             
-
-rms = rmse(idealVol, tgv_gpu3D)
-pars['rmse'] = rms
-
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,2,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(tgv_gpu3D[10,:,:], cmap="gray")
-plt.title('{}'.format('Recovered volume on the GPU using TGV'))
-#%%
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("_______________NDF-TV (3D)_________________")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-
-## plot 
-fig = plt.figure()
-plt.suptitle('Performance of NDF regulariser using the GPU')
-a=fig.add_subplot(1,2,1)
-a.set_title('Noisy Image')
-imgplot = plt.imshow(noisyVol[10,:,:],cmap="gray")
-
-# set parameters
-pars = {'algorithm' : NDF, \
-        'input' : noisyVol,\
-        'regularisation_parameter':0.025, \
-        'edge_parameter':0.015,\
-        'number_of_iterations' :500 ,\
-        'time_marching_parameter':0.025,\
-        'penalty_type':  1
-        }
-
-print ("#############NDF GPU####################")
-start_time = timeit.default_timer()
-ndf_gpu3D = NDF(pars['input'], 
-              pars['regularisation_parameter'],
-              pars['edge_parameter'], 
-              pars['number_of_iterations'],
-              pars['time_marching_parameter'], 
-              pars['penalty_type'],'gpu')
-
-rms = rmse(idealVol, ndf_gpu3D)
-pars['rmse'] = rms
-
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,2,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(ndf_gpu3D[10,:,:], cmap="gray")
-plt.title('{}'.format('Recovered volume on the GPU using NDF'))
-
-#%%
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("___Anisotropic Diffusion 4th Order (3D)____")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-
-## plot 
-fig = plt.figure()
-plt.suptitle('Performance of DIFF4th regulariser using the GPU')
-a=fig.add_subplot(1,2,1)
-a.set_title('Noisy Image')
-imgplot = plt.imshow(noisyVol[10,:,:],cmap="gray")
-
-# set parameters
-pars = {'algorithm' : Diff4th, \
-        'input' : noisyVol,\
-        'regularisation_parameter':3.5, \
-        'edge_parameter':0.02,\
-        'number_of_iterations' :300 ,\
-        'time_marching_parameter':0.0015
-        }
-        
-print ("#############DIFF4th CPU################")
-start_time = timeit.default_timer()
-diff4_gpu3D = Diff4th(pars['input'], 
-              pars['regularisation_parameter'],
-              pars['edge_parameter'], 
-              pars['number_of_iterations'],
-              pars['time_marching_parameter'],'gpu')
-             
-rms = rmse(idealVol, diff4_gpu3D)
-pars['rmse'] = rms
-
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,2,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(diff4_gpu3D[10,:,:], cmap="gray")
-plt.title('{}'.format('GPU results'))
-
-#%%
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-print ("_______________FGP-dTV (3D)________________")
-print ("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
-
-## plot 
-fig = plt.figure()
-plt.suptitle('Performance of FGP-dTV regulariser using the GPU')
-a=fig.add_subplot(1,2,1)
-a.set_title('Noisy Image')
-imgplot = plt.imshow(noisyVol[10,:,:],cmap="gray")
-
-# set parameters
-pars = {'algorithm' : FGP_dTV, \
-        'input' : noisyVol,\
-        'refdata' : noisyRef,\
-        'regularisation_parameter':0.04, \
-        'number_of_iterations' :300 ,\
-        'tolerance_constant':0.00001,\
-        'eta_const':0.2,\
-        'methodTV': 0 ,\
-        'nonneg': 0 ,\
-        'printingOut': 0 
-        }
-
-print ("#############FGP TV GPU####################")
-start_time = timeit.default_timer()
-fgp_dTV_gpu3D = FGP_dTV(pars['input'],
-              pars['refdata'], 
-              pars['regularisation_parameter'],
-              pars['number_of_iterations'],
-              pars['tolerance_constant'], 
-              pars['eta_const'],
-              pars['methodTV'],
-              pars['nonneg'],
-              pars['printingOut'],'gpu')
-
-rms = rmse(idealVol, fgp_dTV_gpu3D)
-pars['rmse'] = rms
-
-txtstr = printParametersToString(pars)
-txtstr += "%s = %.3fs" % ('elapsed time',timeit.default_timer() - start_time)
-print (txtstr)
-a=fig.add_subplot(1,2,2)
-
-# these are matplotlib.patch.Patch properties
-props = dict(boxstyle='round', facecolor='wheat', alpha=0.75)
-# place a text box in upper left in axes coords
-a.text(0.15, 0.25, txtstr, transform=a.transAxes, fontsize=14,
-         verticalalignment='top', bbox=props)
-imgplot = plt.imshow(fgp_dTV_gpu3D[10,:,:], cmap="gray")
-plt.title('{}'.format('Recovered volume on the GPU using FGP-dTV'))
-#%%
diff --git a/docs/demos/qualitymetrics.py b/docs/demos/qualitymetrics.py
deleted file mode 100644
index 850829e..0000000
--- a/docs/demos/qualitymetrics.py
+++ /dev/null
@@ -1,18 +0,0 @@
-#!/usr/bin/env python3
-# -*- coding: utf-8 -*-
-"""
-Created on Wed Feb 21 13:34:32 2018
-# quality metrics
-@authors: Daniil Kazantsev, Edoardo Pasca
-"""
-import numpy as np
-
-def nrmse(im1, im2):
-    rmse = np.sqrt(np.sum((im2 - im1) ** 2) / float(im1.size))
-    max_val = max(np.max(im1), np.max(im2))
-    min_val = min(np.min(im1), np.min(im2))
-    return 1 - (rmse / (max_val - min_val))
-    
-def rmse(im1, im2):
-    rmse = np.sqrt(np.sum((im1 - im2) ** 2) / float(im1.size))
-    return rmse
diff --git a/docs/images/TV_vs_NLTV.jpg b/docs/images/TV_vs_NLTV.jpg
deleted file mode 100644
index e976512..0000000
--- a/docs/images/TV_vs_NLTV.jpg
+++ /dev/null
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-One can install CCPi-RGL toolkit using cmake:
-
-
-cmake ../CCPi-Regularisation-Toolkit/ -DBUILD_MATLAB_WRAPPERS=ON -DBUILD_PYTHON_WRAPPERS=OFF -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=install -DMatlab_ROOT_DIR=<Matlab directory> -DBUILD_CUDA=OFF
-
-make 
-
-make install 
-
-Running Matlab from Linux do:
-PATH="/path/to/mex/:$PATH" LD_LIBRARY_PATH="/path/to/library:$LD_LIBRARY_PATH" ./matlab -nosplash &