Re: -ve value of correlation coefficient

From: Armin Doerry (adoerry_at_yahoo.com)
Date: 11/21/04 

Date: Sun, 21 Nov 2004 10:02:57 -0700

Something that is sometimes done is to take the absolute value of the
correlation coefficient, which maps to [0,1] and scale it to [0,255].

This is because -1 indicates "highly correlated" just like +1, whereas
minimum correlation is at 0. 

-- 
Armin Doerry
adoerry@yahoo.com
====================
"Cheok Yan Cheng" <yccheok@gmail.com> wrote in message
news:422c6523.0411202317.10a7e08b@posting.google.com...
> With the 12.2-8 equation found in page 703 of digital image processing
> by Gonzalez and Woods, i obtain the correlation coefficient of two
> different images in the range [-1, 1]
>
> if i try to construct a image to represent the correlation coefficient
> of these two image, is it correct for me to normalized the value
> ranged [-1, 1] to [0, 255]?
>
> thank you!
>
> regards
> yan cheng