1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
function [sino_id, sino] = astra_create_sino(data, proj_id)
%--------------------------------------------------------------------------
% [sino_id, sino] = astra_create_sino(data, proj_id)
%
% Create a CPU based forward projection.
%
% data: input volume, can be either MATLAB-data or an astra-identifier.
% proj_id: identifier of the projector as it is stored in the astra-library
% sino_id: identifier of the sinogram data object as it is now stored in the astra-library.
% sino: MATLAB data version of the sinogram
%--------------------------------------------------------------------------
%--------------------------------------------------------------------------
% This file is part of the ASTRA Toolbox
%
% Copyright: 2010-2021, imec Vision Lab, University of Antwerp
% 2014-2021, CWI, Amsterdam
% License: Open Source under GPLv3
% Contact: astra@astra-toolbox.com
% Website: http://www.astra-toolbox.com/
%--------------------------------------------------------------------------
% get projection geometry
proj_geom = astra_mex_projector('projection_geometry', proj_id);
vol_geom = astra_mex_projector('volume_geometry', proj_id);
% store volume
if (numel(data) > 1)
volume_id = astra_mex_data2d('create','-vol', vol_geom, data);
else
volume_id = data;
end
% store sino
sino_id = astra_mex_data2d('create','-sino', proj_geom, 0);
if astra_mex_projector('is_cuda', proj_id)
cfg = astra_struct('FP_CUDA');
else
cfg = astra_struct('FP');
end
cfg.ProjectorId = proj_id;
cfg.ProjectionDataId = sino_id;
cfg.VolumeDataId = volume_id;
% create sinogram
alg_id = astra_mex_algorithm('create', cfg);
astra_mex_algorithm('iterate', alg_id);
astra_mex_algorithm('delete', alg_id);
if (numel(data) > 1)
astra_mex_data2d('delete', volume_id);
end
if nargout >= 2
sino = astra_mex_data2d('get',sino_id);
end
|
