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90 lines
4.8 KiB
Matlab
90 lines
4.8 KiB
Matlab
% SART_ZSPLIT simple wrapper of the SART function that allows easy dataset
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% splitting along the vertical axis
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%
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% rec=SART_zsplit(rec, sinogram, cfg, vectors, cache, relax )
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%
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% Inputs:
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% **rec - initial guess of the reconstruction
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% **sino - sinogram (Nlayers x width x Nangles)
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% **cfg - config struct from ASTRA_initialize
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% **vectors - vectors of projection rotation generated by ASTRA_initialize
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% **Niter - number of iterations
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% **relax - 0 == no relaxation, -> relax projection in presence of noise
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% **split - split parameter for the ASTRA projector
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% *optional*
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% ** split =[1,1,1] - split the solved volume, split(3 is used to split in separated blocks, split(1:2) is used inside Atx_partial to du subplitting for ASTRA
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% ** valid_angles = [] - list of valid angles, []==all are valid
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% ** filter = 'ram-lak' - name of the FBP filter
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% ** filter_value = 1 - fitlering value for the FBP filter
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% ** deformation_fields = {} - cell 3x1 of deformation arrays
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% ** inv_deformation_fields={}-cell 3x1 of inverse deformation arrays
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% ** GPU = [] - list of GPUs to be used in reconstruction
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% ** split_sub = [1,1,1] - splitting of the sub block on smaller tasks in the Atx_partial method , 1 == no splitting
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% ** verbose = 1 - verbose = 0 : quiet, verbose : standard info , verbose = 2: debug
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% ** relax = 0 - relaxation constant, shorter steps , 1 == no relaxation
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% ** constraint= [] - constraint function that will be applied after every step
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%
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% *returns*
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% ++rec - FBP reconstruction
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%*-----------------------------------------------------------------------*
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%| |
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%| Except where otherwise noted, this work is licensed under a |
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%| Creative Commons Attribution-NonCommercial-ShareAlike 4.0 |
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%| International (CC BY-NC-SA 4.0) license. |
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%| |
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%| Copyright (c) 2017 by Paul Scherrer Institute (http://www.psi.ch) |
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%| |
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%| Author: CXS group, PSI |
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%*-----------------------------------------------------------------------*
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% You may use this code with the following provisions:
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%
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% If the code is fully or partially redistributed, or rewritten in another
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% computing language this notice should be included in the redistribution.
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%
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% If this code, or subfunctions or parts of it, is used for research in a
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% publication or if it is fully or partially rewritten for another
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% computing language the authors and institution should be acknowledged
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% in written form in the publication: “Data processing was carried out
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% using the “cSAXS matlab package” developed by the CXS group,
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% Paul Scherrer Institut, Switzerland.”
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% Variations on the latter text can be incorporated upon discussion with
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% the CXS group if needed to more specifically reflect the use of the package
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% for the published work.
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%
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% A publication that focuses on describing features, or parameters, that
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% are already existing in the code should be first discussed with the
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% authors.
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%
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% This code and subroutines are part of a continuous development, they
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% are provided “as they are” without guarantees or liability on part
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% of PSI or the authors. It is the user responsibility to ensure its
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% proper use and the correctness of the results.
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function rec=SART_zsplit(rec, sinogram, cfg, vectors, cache, relax )
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[Nlayers, ~, ~] = size(sinogram);
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Nvols = ceil(numel(rec)*4 / 1024e6);
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Nlayers_on_GPU = ceil(Nlayers/Nvols);
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for i = 1:ceil(Nlayers/Nlayers_on_GPU)
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progressbar(i, ceil(Nlayers/Nlayers_on_GPU))
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ind = (1+(i-1)*Nlayers_on_GPU):min(i*Nlayers_on_GPU, Nlayers);
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%%%%%%%%%%%%%%%%%%%% SART SPLIT + MOVE TO GPU %%%%%%%%%%%%%%%%%%%%%%%
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rec_tmp = gpuArray(rec(:,:,ind));
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sinogram_tmp = gpuArray(sinogram(ind,:,:));
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cfg_tmp = cfg;
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cfg_tmp.iVolZ = length(ind);
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cfg_tmp.iProjV = length(ind);
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cache_tmp = cache;
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cache_tmp.R = cache_tmp.R(ind,:,:);
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%% call normal SART
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rec_tmp = SART(rec_tmp, sinogram_tmp, cfg_tmp, vectors, cache_tmp, relax ) ;
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rec(:,:,ind) = gather(rec_tmp);
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end
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end
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