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Diffstat (limited to 'samples/s014_FBP.m')
-rw-r--r-- | samples/s014_FBP.m | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/samples/s014_FBP.m b/samples/s014_FBP.m new file mode 100644 index 0000000..7cce28f --- /dev/null +++ b/samples/s014_FBP.m @@ -0,0 +1,47 @@ +%------------------------------------------------------------------------ +% This file is part of the +% All Scale Tomographic Reconstruction Antwerp Toolbox ("ASTRA-Toolbox") +% +% Copyright: iMinds-Vision Lab, University of Antwerp +% License: Open Source under GPLv3 +% Contact: mailto:astra@ua.ac.be +% Website: http://astra.ua.ac.be +%------------------------------------------------------------------------ + +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); + +% create configuration +cfg = astra_struct('FBP_CUDA'); +cfg.ReconstructionDataId = rec_id; +cfg.ProjectionDataId = sinogram_id; +cfg.FilterType = 'Ram-Lak'; + +% possible values for FilterType: +% none, ram-lak, shepp-logan, cosine, hamming, hann, tukey, lanczos, +% triangular, gaussian, barlett-hann, blackman, nuttall, blackman-harris, +% blackman-nuttall, flat-top, kaiser, parzen + + +% Create and run the algorithm object from the configuration structure +alg_id = astra_mex_algorithm('create', cfg); +astra_mex_algorithm('run', alg_id); + +% Get the result +rec = astra_mex_data2d('get', rec_id); +figure(3); 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', rec_id); +astra_mex_data2d('delete', sinogram_id); |