Re: Can gray image’ pixel value be negative?

lijing <verylijing@xxxxxxx> wrote in message <1aeb3683-1e4d-4b5f-ad51-116d3d71527a@xxxxxxxxxxxxxxxxxxxxxxxxxxx>...
Want to normalize an gray image to zero mean and unit variance, but
now I wonder could a gray image=92 pixel value be negative? I have never
seen. Could you give some explanation?
Thank you for your attention! Thank you for your replay!

I believe the gray pixel alues are between 0 and 1, don't know what happens if you make a value negative
.

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