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From: ajoec1@westminster.ac.uk (Adrian Ford)
Subject: Re: RGB to HSI code
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Date: Tue, 16 May 1995 11:49:53 GMT
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Dan Lyke (danlyke@chattanooga.net) wrote:
: In article <3oscil$7sn@nuscc.nus.sg>, eng20299@leonis.nus.sg says...

: >Does anyone have the code to do RGB to HSI (and vice versa) color space
: >conversion? Or anyone knows where I can find it?
: >I have searched the book Computer Graphics by Foley but it doesn't have
: >the algorithm for RGB to HSI. Thanks for any help given.

: Are you sure that your HSI isn't the same as HSV? I've never heard of 
: HSI, but I'd assume that that trailing "I" would stand for "Intensity" 
: which could make it the same as HSV's "Value".

: Or, is the difference just in the gamma correction of the color model, in 
: which case I'd recommend you check at http://www.inforamp.net/~poynton/ 
: for Charles Poynton's works on color spaces and gamma correction.

: Dan

Or HSI in Digital Image Processing by Gonzalez and Woods, addision 
wesley (publishers) - see also coloureq.txt at

ftp.wmin.ac.uk/pub/itrg

or via http://www.wmin.ac.uk/ITRG

(charles poyntons docs very recommended)

regards, adrian


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Adrian Ford                        Imaging Technology Research Group
University of Westminster, 18-22 Riding House Street, London W1P 7PD
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