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Re: [css3-colors] Comments on Last Call

From: Chris Lilley <chris@w3.org>
Date: Tue, 15 Apr 2003 06:24:31 +0200
Message-ID: <6178333578.20030415062431@w3.org>
To: Chris Lilley <chris@w3.org>
CC: (wrong string) Çelik <tantek@cs.stanford.edu>, Christoph Päper <christoph@paeper.de>, <www-style@w3.org>

On Tuesday, April 15, 2003, 6:04:10 AM, Chris wrote:

CL> Actually no. The original algorithms for HSL to RGB were written in
CL> 1978 by Alvey Ray Smith, who wanted to have a polar system that was
CL> similar to the polar CIE LCH system introduced in 1976, but trading
CL> simpler mathematics for lack of perceptual uniformity or colorimetric
CL> accuracy.

CL> Smith, A. R. "Color Gamut Transform Pairs". Computer Graphics 12, 3 (Aug.
CL> 1978), 12-19.

In connection with which, for implementors, this code from Graphics
Gems (a series of books about useful graphic code) might be of
interest.

A Fast HSL-to-RGB Transform
by Ken Fishkin, Pixar Inc., January 1989
from "Graphics Gems", Academic Press, 1990

http://www.acm.org/pubs/tog/GraphicsGems/gems/HSLtoRGB.c

you will also need

http://www.acm.org/pubs/tog/GraphicsGems/gems/GraphicsGems.h

-- 
 Chris                            mailto:chris@w3.org
Received on Tuesday, 15 April 2003 00:24:51 GMT

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