Split an image into two sets

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Simona Neacsu 2019-10-27

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https://ww2.mathworks.cn/matlabcentral/answers/487668-split-an-image-into-two-sets

评论： Simona Neacsu 2019-10-30

Hi, I need to split an image into two sets of pixels A and B, each randomly containing half of the pixels (using the rand function). Thanks in advance for any help.

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回答（1 个）

Matt J 2019-10-27

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https://ww2.mathworks.cn/matlabcentral/answers/487668-split-an-image-into-two-sets#answer_398428

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N=numel(yourImage);
indices=randperm(N,round(N/2));
A=yourImage(indices);
B=yourImage; B(indices)=[];

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Simona Neacsu 2019-10-30

在 MATLAB Online 中打开

Thanks! This helped a lot. This is how I finally did it:

randomind=randperm(numel(inital_image), numel(inital_image)/2);
imageA=image1;
imageA(randomind)=0;
imageB=imageA;
for i=1:size(imageA,1)
    for j=1:size(imageA,2)
if (imageA(i,j)==0) imageA(i,j)=image1(i,j); 
elseif (imageA(i,j)~=0) imageA(i,j)=0; end
end
end