June 1995
Intermediate to advanced
438 pages
10h 53m
English
Content preview from Graphics Gems V (IBM Version)
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II.5
Parallelohedra and Uniform Quantization
Buckley Robert, Xerox Digital Imaging Technology Center Webster, New York. E-mail address: buckley.wbst128@xerox.com
This gem describes a method of quantizing values (locating the nearest neighbor) in 3-space. The method was originally intended as an optimal means of color coding, using a non-Cartesian partitioning of space. The solution, based upon the geometry of the truncated octahedron, has general applications, as in heuristics for intersection testing.
Original Problem
More and more, color image, interchange, and management applications are using the 1976 CIE L*a*b* or “CIELAB” color space to represent color data. CIELAB (together with CIELUV) comprises CIE recommendations defining approximately ...
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