MATLAB: Cropping Watermarked image of 512 by % 512

digital image processingImage Processing Toolboxsteganographywatermarking

Hello Team,
I working Watermarking Scheme. I have achived the watermarked image already. I want to crop the watermarked image of 512* 512 to 25%? How can do it using imcrop or any other method in MATLab?

Best Answer

I am assuming you want to crop about the center of the image. Give this a try (you might want to adjust using round, floor, ceil, etc... depending on your data)
I = imread('Test.png');
[rows cols dim] = size(I);
BB = [round(cols*0.375) round(rows*0.375) round(cols*0.25) round(rows*0.25)];
J = imcrop(I,BB);
subplot(1,2,1); imshow(I)
subplot(1,2,2); imshow(J)
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