Virtual Colour Systems Ltd.   Virtual Colour Systems Ltd.

Virtual Atlas Home  Help Menu
CIELuv
The CIE 1976 (L*,u*,v*) system, abbreviated to CIELuv, is an improvement of the CIE 1964 (U*,V*,W*) system which it supersedes. The rectangular coordinates L*,u*,v* of this system are calculated from the CIE X,Y,Z tristimulus values by equations. Lightness forms the central axis of the system with the u and v axes perpendicular to the lightness axis and each other. Planes of constant lightness form uv chromaticity planes.
CIELuv - constant L
The u axis approximates to the red-green axis and varies in extent based on Lightness.
CIELuv - constant u
The v axis approximates to the yellow-blue axis and varies in extent based on Lightness.
CIELuv - constant v
Copyright 2011, Virtual Colour Systems Ltd. All Rights Reserved