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74 lines
3.2 KiB
Matlab
74 lines
3.2 KiB
Matlab
% MTIMES_STACK Extension of @mtimes function for stacked images and GPU
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%
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% C = mtimes_stack(A,B)
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% returns the propagated wavefield
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% Inputs:
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% **A first matrix
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% **B second matrix
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% *returns*
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% ++C product matrix
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%
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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 C = mtimes_stack(A,B)
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if isa(A, 'gpuArray') || isa(B, 'gpuArray')
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C = pagefun(@mtimes, A,B);
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return
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end
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% CPU code
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if ismatrix(A) && ismatrix(B)
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C = mtimes(A,B);
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elseif ismatrix(A) && ndims(B) == 3
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Np = size(B);
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C = reshape(A*reshape(B,Np(1),[]), Np);
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elseif ndims(A) == 3 && ismatrix(B)
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Np = size(A);
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fdims = 1:ndims(A);
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fdims(1:2) = [2,1];
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C = permute(reshape(B*reshape(permute(A,fdims),Np(2),[]),Np(fdims)),fdims);
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else
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C = zeros(size(A,1), size(B,2), size(B,3), 'like', A);
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for ii = 1:size(B,3)
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C(:,:,ii) = A(:,:,ii) * B(:,:,ii);
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end
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end
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end
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