how to encode and decode negative pixel to positive pixel in matlab ?

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nur aqila
nur aqila 2018-3-3
评论： nur aqila 2018-3-6
hi, I want to ask. I have 512x512 image and I want to calculate the entropy. But, it has some error because the pixel contains negative value. Has anybody in here know how to do Matlab code to convert negative pixel to positive pixel and decode it back? please help me

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Image Analyst
Image Analyst 2018-3-3
Try this:
negPixels = grayImage < 0;
grayImage(negPixels) = 0; % or 1 or whatever you want.

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