source: project/wiki/eggref/5/color @ 36800

[[toc:]]
[[tags: egg]]

== color

Measurement-based Color Spaces


=== Description

A port of the [[http://people.csail.mit.edu/jaffer/SLIB|SLIB]] color library. For documentation see:

[[http://people.csail.mit.edu/jaffer/slib/Color.html#Color|color]]


=== Requirements

[[srfi-13]], [[fmt]], [[records]]


=== Examples

<enscript hightlight=scheme>
;;; construct some colors in various color spaces
;;; and measure their distance from the D65 white-point

(use color)

(let ((rgb-red    (make-color 'sRGB   '(255  0    0)))
          (lab-yellow (make-color 'L*a*b* '( 76  7  130)))
          (luv-blue   (make-color 'L*u*v* '( 32 -9 -132))))
  (print "rgb-red's distance from the D65 whitepoint is "    (CIE:DE* rgb-red D65 D65))
  (print "lab-yellow's distance from the D65 whitepoint is " (CIE:DE* lab-yellow D65 D65))
  (print "luv-blue's distance from the D65 whitepoint is "   (CIE:DE* luv-blue D65 D65))
  (print "D65's distance from the D65 whitepoint is "        (CIE:DE* D65 D65 D65)))
</enscript>


=== Author

Aubrey Jaffer


=== Maintainer

Erik Falor <ewfalor at gmail dot com>


=== Version history

; 1.1 : Ported to CHICKEN 5
; 1.0 : Initial release as CHICKEN Scheme egg


=== License

Copyright 2001, 2002 Aubrey Jaffer

Permission to copy this software, to modify it, to redistribute it,
to distribute modified versions, and to use it for any purpose is
granted, subject to the following restrictions and understandings.

1.  Any copy made of this software must include this copyright notice
in full.

2.  I have made no warranty or representation that the operation of
this software will be error-free, and I am under no obligation to
provide any services, by way of maintenance, update, or otherwise.

3.  In conjunction with products arising from the use of this
material, there shall be no use of my name in any advertising,
promotional, or sales literature without prior written consent in
each case.