Re: Can gray image’ pixel value be negative?
- From: ImageAnalyst <imageanalyst@xxxxxxxxxxxxxx>
- Date: Mon, 22 Sep 2008 09:46:23 -0700 (PDT)
On Sep 22, 3:27 am, lijing <verylij...@xxxxxxx> wrote:
Want to normalize an gray image to zero mean and unit variance, but
now I wonder could a gray image’ pixel value be negative? I have never
seen. Could you give some explanation?
Thank you for your attention! Thank you for your replay!
-------------------------------------
lijing:
Yes it can. It can be positive, negative, or even a complex number.
It can be integer or floating point. It can be monochrome, color, or
multispectral. All that matters is that it describes the spatial
characteristics of an image. Spatially, the image can be 2D, 3D, or
even higher dimensions. Not sure how to explain these concepts other
than just to state that it is so.
Regards,
ImageAnalyst
.
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