forked from mrq/DL-Art-School
21 lines
608 B
Mathematica
21 lines
608 B
Mathematica
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function [im_h] = backprojection(im_h, im_l, maxIter)
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[row_l, col_l,~] = size(im_l);
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[row_h, col_h,~] = size(im_h);
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p = fspecial('gaussian', 5, 1);
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p = p.^2;
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p = p./sum(p(:));
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im_l = double(im_l);
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im_h = double(im_h);
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for ii = 1:maxIter
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im_l_s = imresize(im_h, [row_l, col_l], 'bicubic');
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im_diff = im_l - im_l_s;
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im_diff = imresize(im_diff, [row_h, col_h], 'bicubic');
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im_h(:,:,1) = im_h(:,:,1) + conv2(im_diff(:,:,1), p, 'same');
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im_h(:,:,2) = im_h(:,:,2) + conv2(im_diff(:,:,2), p, 'same');
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im_h(:,:,3) = im_h(:,:,3) + conv2(im_diff(:,:,3), p, 'same');
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end
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