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92 lines
3.7 KiB
Matlab
92 lines
3.7 KiB
Matlab
% CROP_PAD_3D adjusts the size by zero padding or cropping
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%
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% [ imout ] = crop_pad_3D( img, outsize, varargin)
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%
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% Inputs
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% **img input 3D volume
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% **outsize size of output volume
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% **fill value to fill the padded regions
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% Outputs
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% ++imout output volume after cropping / padding to size "outsize"
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%
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% Example :
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% volData = ones(100,100,100)
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% [ volData_out ] = crop_pad_3D( volData, [50,50,200])
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% size(volData_out) == [50,50,200]
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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 [ imout ] = crop_pad_3D( img, outsize, fill)
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if nargin < 1
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fprintf('CROP_PAD: adjusts the size by zero padding or cropping\n');
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fprintf('crop_pad(img, outsize)\n');
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return
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end
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if nargin < 3
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fill = 0;
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end
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Nout = outsize(1:3);
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Nin = size(img);
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if all(Nin ==Nout) % dont do anything if input array size == output size
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imout = img;
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return
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end
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center = floor(Nin(1:3)/2)+1;
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imout = zeros(outsize,'like',img) + fill;
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centerout = floor(Nout/2)+1;
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cenout_cen = centerout - center;
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imout(max(cenout_cen(1)+1,1):min(cenout_cen(1)+Nin(1),Nout(1)),...
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max(cenout_cen(2)+1,1):min(cenout_cen(2)+Nin(2),Nout(2)),...
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max(cenout_cen(3)+1,1):min(cenout_cen(3)+Nin(3),Nout(3))) ...
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= img(max(-cenout_cen(1)+1,1):min(-cenout_cen(1)+Nout(1),Nin(1)),...
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max(-cenout_cen(2)+1,1):min(-cenout_cen(2)+Nout(2),Nin(2)),...
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max(-cenout_cen(3)+1,1):min(-cenout_cen(3)+Nout(3),Nin(3)));
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if ~isreal(img)
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imout = complex(imout);
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end
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end
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