NB. Some useful definitions for color conversions.
NB. We assume that color values are represented as a
NB. 3 element vector (rgb cmy range from 0 255)

NB. http://www.kodak.com/US/en/corp/researchDevelopment/technologyFeatures/gamut.shtml
NB. Compares CRT and printer gamut.

NB. http://www.aim-dtp.net/index.htm
NB. Accurate Image Manipulation site.

NB. XWindows CRT gamma correction
NB. [jhowland@Ariel jhowland]$ xgamma -gamma 1.0

NB. http://www.aim-dtp.net/aim/technology/crt_gamut/
NB. Shows CRT gamut.

NB. http://www.colour.org/tc8-03/survey/s_98mf.html
NB. CIE site

NB. http://www.cs.cf.ac.uk/Dave/Multimedia/BSC_MM_CALLER.html
NB. Dr. David Marshall's MultiMedia course notes (see Colour in Image and Video)

NB. http://www.microsoft.com/hwdev/tech/color/sRGB.asp
NB. Colorspace Interchange Using sRGB

NB. http://www.color.org/sRGB.html
NB. Original sRGB color proposal.

NB. http://www.color.org/
NB. International Color Consortium

NB. http://www.w3.org/TR/css3-color
NB. W3.org's use of sRGB color in web documents.

NB. http://www.color3d.com/index.htm
NB. Windows color matching program

NB. http://www.colormatters.com/news_sept01/feature.html
NB. Color Matters Newsletter

NB. http://www.stereopsis.com/index.html
NB. Misc. graphics museings

NB. http://www.cs.sfu.ca/undergrad/CourseMaterials/CMPT479/material/notes/Chap3/Chap3.3/Chap3.3.htmlNB. Course notes similar to Dave Marshall's

rgb2cmy =: cmy2rgb =: 255&-

NB. When using an intensity  scale of 0 to 1 

rgb2cmy =: cmy2rgb =: 1&-

rgb2yiq =: 3 3 $ 0.299 0.587 0.114 0.596 _0.275 _0.321 0.212 _0.528 0.311

mp =: +/ . *

m_inv =: %.


yiq2rgb =: m_inv rgb2yiq

rgb2yuv =: 3 3 $ 0.299 0.587 0.114 _0.169 _0.331 0.5 0.5 _0.419 _0.081

yuv2rgb =: m_inv rgb2yuv