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Diffstat (limited to 'samples/matlab')
| -rw-r--r-- | samples/matlab/s020_3d_multiGPU.m | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/samples/matlab/s020_3d_multiGPU.m b/samples/matlab/s020_3d_multiGPU.m new file mode 100644 index 0000000..bade325 --- /dev/null +++ b/samples/matlab/s020_3d_multiGPU.m @@ -0,0 +1,38 @@ +% ----------------------------------------------------------------------- +% 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 +% ----------------------------------------------------------------------- + + +% Set up multi-GPU usage. +% This only works for 3D GPU forward projection and back projection. +astra_mex('set_gpu_index', [0 1]); + +% Optionally, you can also restrict the amount of GPU memory ASTRA will use. +% The line commented below sets this to 1GB. +%astra_mex('set_gpu_index', [0 1], 'memory', 1024*1024*1024); + +vol_geom = astra_create_vol_geom(1024, 1024, 1024); + +angles = linspace2(0, pi, 1024); +proj_geom = astra_create_proj_geom('parallel3d', 1.0, 1.0, 1024, 1024, angles); + +% Create a simple hollow cube phantom +cube = zeros(1024,1024,1024); +cube(129:896,129:896,129:896) = 1; +cube(257:768,257:768,257:768) = 0; + +% Create projection data from this +[proj_id, proj_data] = astra_create_sino3d_cuda(cube, proj_geom, vol_geom); + +% Backproject projection data +[bproj_id, bproj_data] = astra_create_backprojection3d_cuda(proj_data, proj_geom, vol_geom); + +astra_mex_data3d('delete', proj_id); +astra_mex_data3d('delete', bproj_id); + |