Merge pull request #16 from dmpelt/python-interface

Add Python interface

1 files changed, 58 insertions, 0 deletions

diff --git a/samples/matlab/s010_supersampling.m b/samples/matlab/s010_supersampling.m
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+++ b/samples/matlab/s010_supersampling.m
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+% -----------------------------------------------------------------------
+% This file is part of the ASTRA Toolbox
+% 
+% Copyright: 2010-2015, iMinds-Vision Lab, University of Antwerp
+%            2014-2015, CWI, Amsterdam
+% License: Open Source under GPLv3
+% Contact: astra@uantwerpen.be
+% Website: http://sf.net/projects/astra-toolbox
+% -----------------------------------------------------------------------
+
+vol_geom = astra_create_vol_geom(256, 256);
+proj_geom = astra_create_proj_geom('parallel', 3.0, 128, linspace2(0,pi,180));
+P = phantom(256);
+
+% Because the astra_create_sino_gpu wrapper does not have support for
+% all possible algorithm options, we manually create a sinogram
+phantom_id = astra_mex_data2d('create', '-vol', vol_geom, P);
+sinogram_id = astra_mex_data2d('create', '-sino', proj_geom);
+cfg = astra_struct('FP_CUDA');
+cfg.VolumeDataId = phantom_id;
+cfg.ProjectionDataId = sinogram_id;
+
+% Set up 3 rays per detector element
+cfg.option.DetectorSuperSampling = 3;
+
+alg_id = astra_mex_algorithm('create', cfg);
+astra_mex_algorithm('run', alg_id);
+astra_mex_algorithm('delete', alg_id);
+astra_mex_data2d('delete', phantom_id);
+
+sinogram3 = astra_mex_data2d('get', sinogram_id);
+
+figure(1); imshow(P, []);
+figure(2); imshow(sinogram3, []);
+
+
+% Create a reconstruction, also using supersampling
+rec_id = astra_mex_data2d('create', '-vol', vol_geom);
+cfg = astra_struct('SIRT_CUDA');
+cfg.ReconstructionDataId = rec_id;
+cfg.ProjectionDataId = sinogram_id;
+% Set up 3 rays per detector element
+cfg.option.DetectorSuperSampling = 3;
+
+% There is also an option for supersampling during the backprojection step.
+% This should be used if your detector pixels are smaller than the voxels.
+
+% Set up 2 rays per image pixel dimension, for 4 rays total per image pixel.
+% cfg.option.PixelSuperSampling = 2;
+
+
+alg_id = astra_mex_algorithm('create', cfg);
+astra_mex_algorithm('iterate', alg_id, 150);
+astra_mex_algorithm('delete', alg_id);
+
+rec = astra_mex_data2d('get', rec_id);
+figure(3); imshow(rec, []);
+