matlab - How can I extract the ROI from mammogram image without using the im2bw function -

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when using matlab code roi extraction mammography image (unit8) must convert binary image. need extract roi without using convert function.

i'm using code

org = imread('mdb.pgm'); org = im2bw(org); ext = org(any(org,2),:); ext = ext(:,any(org,1));


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