Do you lose information when processing images that have been grayscaled?

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raheem mian
raheem mian 2019-10-1
编辑： Matt J 2019-10-1
I have a comple double matrix and I mat2gray the matrix for registration. Am I losing information in terms of the image ? Should I instead apply translations that i find on the mat2grayed matrix to the original matrix?

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Matt J
Matt J 2019-10-1
编辑：Matt J 2019-10-1
If you used this syntax
I = mat2gray(A,[amin amax])
with amin>min(A(:)) or amax<max(A(:)), then yes there will be information loss. All pixels above and below amin and amax get thresholded.

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