diff options
Diffstat (limited to 'matlab/tools/opTomo.m')
| -rw-r--r-- | matlab/tools/opTomo.m | 79 |
1 files changed, 28 insertions, 51 deletions
diff --git a/matlab/tools/opTomo.m b/matlab/tools/opTomo.m index 14128d2..04b3634 100644 --- a/matlab/tools/opTomo.m +++ b/matlab/tools/opTomo.m @@ -44,11 +44,9 @@ classdef opTomo < opSpot vol_id fp_alg_id bp_alg_id + proj_id % ASTRA IDs handle astra_handle - % geometries - proj_geom; - vol_geom; end % properties properties ( SetAccess = private, GetAccess = public ) @@ -139,6 +137,17 @@ classdef opTomo < opSpot error(['Only type ' 39 'cuda' 39 ' is supported ' ... 'for 3D geometries.']) end + + % setup projector + cfg = astra_struct('cuda3d'); + cfg.ProjectionGeometry = proj_geom; + cfg.VolumeGeometry = vol_geom; + cfg.option.GPUindex = gpu_index; + + % create projector + op.proj_id = astra_mex_projector3d('create', cfg); + % create handle to ASTRA object, for cleaning up + op.astra_handle = opTomo_helper_handle(op.proj_id); % create a function handle op.funHandle = @opTomo_intrnl3D; @@ -148,8 +157,6 @@ classdef opTomo < opSpot % pass object properties op.proj_size = proj_size; op.vol_size = vol_size; - op.proj_geom = proj_geom; - op.vol_geom = vol_geom; op.cflag = false; op.sweepflag = false; @@ -169,10 +176,12 @@ classdef opTomo < opSpot if issparse(x) x = full(x); end - - % convert input to single - if isa(x, 'single') == false + + if isa(x, 'double') + isdouble = true; x = single(x); + else + isdouble = false; end % the multiplication @@ -180,6 +189,10 @@ classdef opTomo < opSpot % make sure output is column vector y = y(:); + + if isdouble + y = double(y); + end end % multiply @@ -194,7 +207,7 @@ classdef opTomo < opSpot function y = opTomo_intrnl2D(op,x,mode) if mode == 1 - % X is passed as a vector, reshape it into an image. + % x is passed as a vector, reshape it into an image. x = reshape(x, op.vol_size); % Matlab data copied to ASTRA data @@ -206,7 +219,7 @@ classdef opTomo < opSpot % retrieve Matlab array y = astra_mex_data2d('get_single', op.sino_id); else - % X is passed as a vector, reshape it into a sinogram. + % x is passed as a vector, reshape it into a sinogram. x = reshape(x, op.proj_size); % Matlab data copied to ASTRA data @@ -218,6 +231,7 @@ classdef opTomo < opSpot % retrieve Matlab array y = astra_mex_data2d('get_single', op.vol_id); end + end % opTomo_intrnl2D @@ -225,53 +239,16 @@ classdef opTomo < opSpot function y = opTomo_intrnl3D(op,x,mode) if mode == 1 - % X is passed as a vector, reshape it into an image + % x is passed as a vector, reshape it into an image x = reshape(x, op.vol_size); - % initialize output - y = zeros(op.proj_size, 'single'); - - % link matlab array to ASTRA - vol_id = astra_mex_data3d_c('link', '-vol', op.vol_geom, x, 0); - sino_id = astra_mex_data3d_c('link', '-sino', op.proj_geom, y, 1); - - % initialize fp algorithm - cfg = astra_struct('FP3D_CUDA'); - cfg.ProjectionDataId = sino_id; - cfg.VolumeDataId = vol_id; - - alg_id = astra_mex_algorithm('create', cfg); - % forward projection - astra_mex_algorithm('iterate', alg_id); - - % cleanup - astra_mex_data3d('delete', vol_id); - astra_mex_data3d('delete', sino_id); + y = astra_mex_direct('FP3D', op.proj_id, x); else - % X is passed as a vector, reshape it into projection data + % x is passed as a vector, reshape it into projection data x = reshape(x, op.proj_size); - - % initialize output - y = zeros(op.vol_size,'single'); - - % link matlab array to ASTRA - vol_id = astra_mex_data3d_c('link', '-vol', op.vol_geom, y, 1); - sino_id = astra_mex_data3d_c('link', '-sino', op.proj_geom, x, 0); - % initialize bp algorithm - cfg = astra_struct('BP3D_CUDA'); - cfg.ProjectionDataId = sino_id; - cfg.ReconstructionDataId = vol_id; - - alg_id = astra_mex_algorithm('create', cfg); - - % backprojection - astra_mex_algorithm('iterate', alg_id); - - % cleanup - astra_mex_data3d('delete', vol_id); - astra_mex_data3d('delete', sino_id); + y = astra_mex_direct('BP3D', op.proj_id, x); end end % opTomo_intrnl3D |