From: Martin Feeney (martin at domain tuatha.org)
Date: Fri 03 Sep 1999 - 17:10:13 IST
On 3 Sep 99, at 16:38, Colm Buckley wrote:
> ... which brings us to HLS space (Hue, Luminosity, Saturation). In this
> case, Hue and Saturation mean the same as they do in HSV space, but
> instead of specifying Value, ranging from Black up to "maximum
> brightness", we specify Luminosity, ranging from 0 (black) up to 1
> (white).
Which is _extremely_ handy for calculating smooth-looking gradations from
Colour X to a brighter Colour X especially when the start and end points
cross over the L=0.5 mark. Trying this sort of thing with HSV or RGB is a
nightmare.
Then of course, there's YUV, CIE XYZ, CIE xyY, CIE L*u*v* and CIE L*a*b*,
etc.
A colourspace faq (there are several) is available at:
http://www.inforamp.net/~poynton/Poynton-color.html
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