Page 204 - Computational Colour Science Using MATLAB

CIELABDE.M (BOX 10) 191

11.7 xyz2luv.m (Box 7)

% function [luv,uprime,vprime] = xyz2luv(xyz,obs)
% computes CIELUV Luv values from XYZ tristimulus values
% uprime and vprime are the CIE 1976 UCS coordinates
% requires the illuminant/observer obs to define white
% point
% see function r2xyz for valid values for obs

11.8 car2pol.m (Box 8)

% function [c,h] = cartopol(ab)
% converts a*b* or u*v* into the polar coordinates
% of Chroma C and Hue H
% ab must be a row or column matrix 2 by 1 or 1 by 2
% see also pol2car

11.9 pol2car (Box 9)

% function [a,b] = pol2car(ch)
% converts the polar coordinates
% of Chroma C and Hue H
% ch must be a row or column matrix 2 by 1 or 1 by 2
% see also car2pol

11.10 cielabde.m (Box 10)

% function [de,dl,dc,dh] = cielabde(lab1,lab2)
% computes colour difference from CIELAB values
% using CIELAB formula
% lab1 and lab2 must be 3 by 1 or 1 by 3 matrices
% and contain L*, a* and b* values
% see also cmcde, cie94de, and cie00de