Convert the following HSV triplets to RGB:
(0.2, 0.2, 0.4), (0.2, 0.4, 0.6), (0.6, 0.0, 0.6), (0.2, 0.4, 0.4)

Google search strategy:
"HSV converters"
"RGB converters"

This "Color Space Conversion Applet" at Rochester Institute
of Technology's site handles RGB, HSV, CIE and YIQ:
http://www.cs.rit.edu/~ncs/color/a_spaces.html 

This converter's nice because you can visually see the changes in both
formats.  Again be careful in conversions because this RIT tool is
using 0-245 (instead of the standard 0-255) range for RGB.
 
From hue-saturated values to red-green-blue:
(0.2,0.2,0.4) = (0.40,0.42,0.33)
(0.2,0.4,0.6) = (0.56,0.62,0.37)
(0.6,0.0,0.6) = (0.62,0.62,0.62)
(0.2,0.4,0.4) = (0.38,0.42,0.25)

Best regards,

Omnivorous-GA

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Request for Answer Clarification by eksolutions-ga on 24 Sep 2002 14:37 PDT

Do you know how to convert HSV to RGB mathematically?

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Clarification of Answer by omnivorous-ga on 24 Sep 2002 15:33 PDT

The most-concise definition of HSV as a function of RGB is at the
Exeter School of Engineering and Computer Science site, which notes
that "there is no simple formula" for the conversion of RGB to HSV. 
Instead, hue-saturation-   can be expressed this way, according the
the presentation, "Graphics Standards," (January, 2002):

V = max (r,g,b)
S = (max (r,g,b)) - min (r,g,b)/max (r,g,b)
H = depends on which of r,g,b is the maximum

The Association for Computing machinery RGB-HSV and HSV-RGB
conversions (written in C) are in this paper "The HSV-RGB Transform
Pair" (undated):
http://www.acm.org/jgt/papers/SmithLyons96/hsv_rgb.html

Compaq/DEC have similar routines on this color definition page written
by Stolfi (March, 1988):
http://research.compaq.com/SRC/m3sources/html/color/src/Color.i3.html

EFG Computer labs model has yet a third C code routine for going from
HSV-to-RGB or RGB-to-HSV:
http://plum.ia.polsl.gliwice.pl/~DIP/efg/Graphics/Colors/HSV.htm

Good luck!

Omnivorous-GA

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Clarification of Answer by omnivorous-ga on 24 Sep 2002 15:44 PDT

EK -- The Exeter presentation that I referenced, "Graphics Standards,"
(January, 2002) is here:
http://www.dcs.ex.ac.uk/~wmilne/graphics/standards.pdf

My apologies for being too quick with the mouse!!

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Clarification of Answer by omnivorous-ga on 21 Oct 2002 20:04 PDT

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