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Topic: Can gray image’ pixel value be negative?
Replies: 7   Last Post: Sep 22, 2008 1:15 PM

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ruud verschaeren

Posts: 32
Registered: 7/25/08
Re: Can gray image’ pixel value be negative?
Posted: Sep 22, 2008 6:01 AM
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lijing <verylijing@163.com> wrote in message <1aeb3683-1e4d-4b5f-ad51-116d3d71527a@a8g2000prf.googlegroups.com>...
> 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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