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I = imread('C:\Documents and Settings\admin\Desktop\FDP\Images\apple3.jpg'); [m n p]=size(I); R = I(:,:,1); G = I(:,:,2); B = I(:,:,3); figure,imshow(I); figure,imshow(R); figure,imshow(G); figure,imshow(B); RGB=cat(3,R,G,B); figure,imshow(RGB);