mirror of
https://github.com/c-sooyoung/fold_slice.git
synced 2026-09-17 21:39:08 +09:00
91 lines
4.0 KiB
Matlab
91 lines
4.0 KiB
Matlab
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
% example script for ASTRA wrappers
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
%
|
||
% recompile commands
|
||
% (Linux, GCC 4.8.5) mexcuda -outdir private ASTRA_GPU_wrapper/ASTRA_GPU_wrapper.cu ASTRA_GPU_wrapper/util3d.cu ASTRA_GPU_wrapper/par3d_fp.cu ASTRA_GPU_wrapper/par3d_bp.cu
|
||
% (Windows) mexcuda -outdir private ASTRA_GPU_wrapper\ASTRA_GPU_wrapper.cu ASTRA_GPU_wrapper\util3d.cu ASTRA_GPU_wrapper\par3d_fp.cu ASTRA_GPU_wrapper\par3d_bp.cu
|
||
|
||
|
||
% volume settings
|
||
Npix_vol = [300, 300, 100] ;
|
||
Nangles = 400;
|
||
Npix_proj = [400, 400];
|
||
|
||
% create "data"
|
||
angles = linspace(0, 360, Nangles);
|
||
lamino_angle = 60;
|
||
volData = ones(Npix_vol, 'single');
|
||
|
||
% generate geometry
|
||
[cfg, vectors] = astra.ASTRA_initialize(Npix_vol, Npix_proj, angles, lamino_angle);
|
||
% find optimal split, for small volumes below 600^3 no split is needed
|
||
split = astra.ASTRA_find_optimal_split(cfg);
|
||
|
||
% generate projections
|
||
projData = astra.Ax_partial(volData, cfg, vectors, split);
|
||
|
||
figure(1)
|
||
% plot the projections
|
||
subplot(1,2,1)
|
||
plotting.imagesc3D(projData); axis off image; colormap bone
|
||
title('Angular geometry')
|
||
|
||
% do backprojection projections !!! not FBP !!!
|
||
backprojData = astra.Atx_partial(projData, cfg, vectors, split);
|
||
|
||
|
||
% generate rotation matrix, note that the expected angles needs to be
|
||
% adjusted to provide same results are the previous example
|
||
R3 = utils.get_rotation_matrix_3D((90-lamino_angle)*ones(Nangles,1), -angles, zeros(Nangles,1));
|
||
|
||
% generate geometry
|
||
[cfgR, vectorsR] = astra.ASTRA_initialize(Npix_vol, Npix_proj, R3);
|
||
|
||
% generate projections
|
||
projDataR = astra.Ax_partial(volData, cfgR, vectorsR, split);
|
||
|
||
figure(1)
|
||
% plot the projections
|
||
subplot(1,2,2)
|
||
% plot the projections
|
||
plotting.imagesc3D(projDataR); axis off image; colormap bone
|
||
title('Rotation matrix geometry')
|
||
|
||
|
||
|
||
|
||
%*-----------------------------------------------------------------------*
|
||
%| |
|
||
%| Except where otherwise noted, this work is licensed under a |
|
||
%| Creative Commons Attribution-NonCommercial-ShareAlike 4.0 |
|
||
%| International (CC BY-NC-SA 4.0) license. |
|
||
%| |
|
||
%| Copyright (c) 2017 by Paul Scherrer Institute (http://www.psi.ch) |
|
||
%| |
|
||
%| Author: CXS group, PSI |
|
||
%*-----------------------------------------------------------------------*
|
||
% You may use this code with the following provisions:
|
||
%
|
||
% If the code is fully or partially redistributed, or rewritten in another
|
||
% computing language this notice should be included in the redistribution.
|
||
%
|
||
% If this code, or subfunctions or parts of it, is used for research in a
|
||
% publication or if it is fully or partially rewritten for another
|
||
% computing language the authors and institution should be acknowledged
|
||
% in written form in the publication: “Data processing was carried out
|
||
% using the “cSAXS matlab package” developed by the CXS group,
|
||
% Paul Scherrer Institut, Switzerland.”
|
||
% Variations on the latter text can be incorporated upon discussion with
|
||
% the CXS group if needed to more specifically reflect the use of the package
|
||
% for the published work.
|
||
%
|
||
% A publication that focuses on describing features, or parameters, that
|
||
% are already existing in the code should be first discussed with the
|
||
% authors.
|
||
%
|
||
% This code and subroutines are part of a continuous development, they
|
||
% are provided “as they are” without guarantees or liability on part
|
||
% of PSI or the authors. It is the user responsibility to ensure its
|
||
% proper use and the correctness of the results.
|