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/s012_masks.m | 60 ---------------------------------------------------- 1 file changed, 60 deletions(-) delete mode 100644 samples/s012_masks.m (limited to 'samples/s012_masks.m') diff --git a/samples/s012_masks.m b/samples/s012_masks.m deleted file mode 100644 index d3611a6..0000000 --- a/samples/s012_masks.m +++ /dev/null @@ -1,60 +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 -% ----------------------------------------------------------------------- - - -% In this example we will create a reconstruction in a circular region, -% instead of the usual rectangle. - -% This is done by placing a circular mask on the square reconstruction volume: - -c = -127.5:127.5; -[x y] = meshgrid(-127.5:127.5,-127.5:127.5); -mask = (x.^2 + y.^2 < 127.5^2); - -figure(1); imshow(mask, []); - - -vol_geom = astra_create_vol_geom(256, 256); -proj_geom = astra_create_proj_geom('parallel', 1.0, 384, linspace2(0,pi,50)); - -% As before, create a sinogram from a phantom -P = phantom(256); -[sinogram_id, sinogram] = astra_create_sino_gpu(P, proj_geom, vol_geom); -figure(2); imshow(P, []); -figure(3); imshow(sinogram, []); - -% Create a data object for the reconstruction -rec_id = astra_mex_data2d('create', '-vol', vol_geom); - -% Create a data object for the mask -mask_id = astra_mex_data2d('create', '-vol', vol_geom, mask); - -% Set up the parameters for a reconstruction algorithm using the GPU -cfg = astra_struct('SIRT_CUDA'); -cfg.ReconstructionDataId = rec_id; -cfg.ProjectionDataId = sinogram_id; -cfg.option.ReconstructionMaskId = mask_id; - -% Create the algorithm object from the configuration structure -alg_id = astra_mex_algorithm('create', cfg); - -% Run 150 iterations of the algorithm -astra_mex_algorithm('iterate', alg_id, 150); - -% Get the result -rec = astra_mex_data2d('get', rec_id); -figure(4); imshow(rec, []); - -% Clean up. Note that GPU memory is tied up in the algorithm object, -% and main RAM in the data objects. -astra_mex_algorithm('delete', alg_id); -astra_mex_data2d('delete', mask_id); -astra_mex_data2d('delete', rec_id); -astra_mex_data2d('delete', sinogram_id); -- cgit v1.2.3