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on 30 Oct 2022
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Z=zeros(400,647,3);
Z(1:4,1:4,1)=rand*1e6;
Z(1:4,1:4,2)=rand*1e5;
Z(1:4,1:4,3)=rand*1e4;
K(:,:,1)=idct2(Z(:,:,1));
K(:,:,2)=idct2(Z(:,:,2));
K(:,:,3)=idct2(Z(:,:,3));
imshow(uint8(K));
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