Illustrate CIE xy chromaticity calculations and plots
Chromaticity coordinates are widely used to summarize the hue and saturation of a light. We calculate the chromaticity coordinates and the gamut of light from a display.
See also: chromaticityPlot, displayCreate, displayPlot
Copyright ImagEval Consulting, LLC 2011
Contents
ieInit
Example of a display chromaticity analysis
% Create a display object and plot its white point dFilename = 'lcdExample'; display = displayCreate(dFilename); wPoint = displayGet(display,'white XYZ'); chromaticityPlot(chromaticity(wPoint)); % Show the white point chromaticityPlot(displayGet(display,'white xy'));
Show the chromaticity points of the primaries
spdXYZ = displayGet(display,'primaries xyz'); chromaticityPlot(chromaticity(spdXYZ)); % You can also plot the gamut with the lines this way displayPlot(display,'gamut');
Example of a scene chromaticity analysis
% A macbeth color chart scene = sceneCreate; xyz = sceneGet(scene,'xyz'); xyz = RGB2XWFormat(xyz); chromaticityPlot(chromaticity(xyz)); title('xy chromaticities of MCC chart')
