mirror of
https://github.com/c-sooyoung/fold_slice.git
synced 2026-09-17 18:29:08 +09:00
76 lines
3.8 KiB
Matlab
76 lines
3.8 KiB
Matlab
% Vol = local_TV_zsplit(Vol, lambda, eps, Niter, use_chambolle)
|
||
% FUNCTION
|
||
% - split volume on smaller blocks for processing by local total variation
|
||
% - splitting is done automatically in order to fit to GPU memory
|
||
% Inputs:
|
||
% Vol - refined volume
|
||
% lambda - refinement step (tunning constant)
|
||
% eps - regularization term (tunning constant)
|
||
% Niter - number of iterations
|
||
% use_chambolle - if true use Chambolle method, if false use simple gradient descent solver
|
||
% Recompile:
|
||
% mexcuda -output +regularization/private/local_TV_mex +regularization/private/TV_cuda_texture.cu +regularization/private/local_TV_mex.cpp
|
||
|
||
%*-----------------------------------------------------------------------*
|
||
%| |
|
||
%| 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.
|
||
|
||
|
||
|
||
function Vol = local_TV_zsplit(Vol, lambda, eps, Niter, use_chambolle)
|
||
|
||
keep_on_gpu = isa(Vol, 'gpuArray');
|
||
|
||
gpu = gpuDevice;
|
||
Nlayers = size(Vol,3);
|
||
Nblocks = ceil(numel(Vol)*4 / 1024e6);
|
||
% empirically tested condition
|
||
Nblocks = max(Nblocks, ceil((numel(Vol)*4*14) / gpu.AvailableMemory));
|
||
Nlayers_on_GPU = ceil(Nlayers/Nblocks);
|
||
Nblocks = ceil(Nlayers/Nlayers_on_GPU);
|
||
if Nblocks > 1
|
||
for i = 1:Nblocks
|
||
utils.progressbar(i, ceil(Nlayers/Nlayers_on_GPU))
|
||
ind = (1+(i-1)*Nlayers_on_GPU):min(i*Nlayers_on_GPU, Nlayers);
|
||
Vol_tmp = gpuArray(Vol(:,:,ind));
|
||
Vol_tmp = local_TV_mex(Vol_tmp,lambda,eps, Niter, use_chambolle);
|
||
if ~keep_on_gpu; Vol_tmp = gather(Vol_tmp);end
|
||
Vol(:,:,ind) = Vol_tmp;
|
||
end
|
||
else
|
||
Vol = local_TV_mex(Vol,lambda,eps, Niter, use_chambolle);
|
||
if ~keep_on_gpu; Vol = gather(Vol);end
|
||
end
|
||
|
||
end
|