From 3cae1d138c53a3fd042de3d2c9d9a07cf0650e0f Mon Sep 17 00:00:00 2001 From: "Daniel M. Pelt" Date: Tue, 24 Feb 2015 12:35:45 +0100 Subject: Added Python interface --- samples/s016_plots.m | 54 ---------------------------------------------------- 1 file changed, 54 deletions(-) delete mode 100644 samples/s016_plots.m (limited to 'samples/s016_plots.m') diff --git a/samples/s016_plots.m b/samples/s016_plots.m deleted file mode 100644 index 1455c6d..0000000 --- a/samples/s016_plots.m +++ /dev/null @@ -1,54 +0,0 @@ -% ----------------------------------------------------------------------- -% 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', 1.0, 384, linspace2(0,pi,180)); - -% As before, create a sinogram from a phantom -P = phantom(256); -[sinogram_id, sinogram] = astra_create_sino_gpu(P, proj_geom, vol_geom); -figure(1); imshow(P, []); -figure(2); imshow(sinogram, []); - -% Create a data object for the reconstruction -rec_id = astra_mex_data2d('create', '-vol', vol_geom); - -% Set up the parameters for a reconstruction algorithm using the GPU -cfg = astra_struct('SIRT_CUDA'); -cfg.ReconstructionDataId = rec_id; -cfg.ProjectionDataId = sinogram_id; - -% Create the algorithm object from the configuration structure -alg_id = astra_mex_algorithm('create', cfg); - -% Run 1500 iterations of the algorithm one at a time, keeping track of errors -nIters = 1500; -phantom_error = zeros(1, nIters); -residual_error = zeros(1, nIters); -for i = 1:nIters; - % Run a single iteration - astra_mex_algorithm('iterate', alg_id, 1); - - residual_error(i) = astra_mex_algorithm('get_res_norm', alg_id); - rec = astra_mex_data2d('get', rec_id); - phantom_error(i) = sqrt(sumsqr(rec - P)); -end - -% Get the result -rec = astra_mex_data2d('get', rec_id); -figure(3); imshow(rec, []); - -figure(4); plot(residual_error) -figure(5); plot(phantom_error) - -% Clean up. -astra_mex_algorithm('delete', alg_id); -astra_mex_data2d('delete', rec_id); -astra_mex_data2d('delete', sinogram_id); -- cgit v1.2.3