jens
7b34529b24
git-svn-id: http://moon:8086/svn/matlab/trunk@91 801c6759-fa7c-4059-a304-17956f83a07c
26 lines
733 B
Matlab
26 lines
733 B
Matlab
function patches = samplePatches(rawImages, patchSize, numPatches)
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% rawImages is of size (image width)*(image height) by number_of_images
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% We assume that image width = image height
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imWidth = sqrt(size(rawImages,1));
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imHeight = imWidth;
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numImages = size(rawImages,2);
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rawImages = reshape(rawImages,imWidth,imHeight,numImages);
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% Initialize patches with zeros.
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patches = zeros(patchSize*patchSize, numPatches);
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% Maximum possible start coordinate
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maxWidth = imWidth - patchSize + 1;
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maxHeight = imHeight - patchSize + 1;
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% Sample!
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for num = 1:numPatches
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x = randi(maxHeight);
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y = randi(maxWidth);
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img = randi(numImages);
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p = rawImages(x:x+patchSize-1,y:y+patchSize-1, img);
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patches(:,num) = p(:);
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end
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