mirror of
https://github.com/c-sooyoung/fold_slice.git
synced 2026-09-17 23:59:11 +09:00
54 lines
1.2 KiB
Matlab
54 lines
1.2 KiB
Matlab
% CROP_PAD adjusts the size by zero padding or cropping
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% Inputs:
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% **img input image
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% **outsize size of final image
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% *optional:*
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% **fill value to fill padded regions
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% returns:
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% ++imout cropped image
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function [ imout ] = crop_pad( 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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Nin = size(img);
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if isempty(outsize) || all(outsize(1:2) == Nin(1:2))
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imout = img; % if outsize == [], return the same image without changes
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return
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end
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Nout = outsize(1:2);
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if nargin < 3
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fill = 0;
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end
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center = floor(Nin(1:2)/2)+1;
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imout = zeros([Nout,Nin(3:end)],'like',img);
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if fill ~= 0
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imout = imout + fill;
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end
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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)),max(cenout_cen(2)+1,1):min(cenout_cen(2)+Nin(2),Nout(2)),:,:) ...
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= img(max(-cenout_cen(1)+1,1):min(-cenout_cen(1)+Nout(1),Nin(1)),max(-cenout_cen(2)+1,1):min(-cenout_cen(2)+Nout(2),Nin(2)),:,:);
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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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