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disorg.m
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disorg.m
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function [imageBlocks,rows,cols] = disorg(image,blockSize)
%DISORG 将原图像打乱,划分为 blocksize x blocksize x 3 x n 小块
% image: 原图像(imdouble)
% blockSize: 拼图正方形小块边长
% imageblocks: 拆分并打乱后的小块
% rows: 拼图行数
% cols: 拼图列数
%
% CVX-Jigsaw
imageSize = size(image);
rows = floor(imageSize(1) / blockSize);
cols = floor(imageSize(2) / blockSize);
partsNum = rows * cols;
image = image(1:rows*blockSize,1:cols*blockSize,:);
rgbPartsArray = zeros([blockSize,blockSize,3,partsNum],class(image));
for i = 1:partsNum
rowStartIndex = (ceil(i/cols)-1) * blockSize + 1;
rowEndIndex = rowStartIndex + (blockSize-1);
colStartIndex = mod(i-1, cols) * blockSize + 1;
colEndIndex = colStartIndex + (blockSize-1);
rgbPartsArray(:,:,:,i) = image(rowStartIndex:rowEndIndex,colStartIndex:colEndIndex,:);
end
partsOrder = randperm(partsNum);
imageBlocks = rgbPartsArray(:,:,:,partsOrder);
end