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Volume: 9 | Article ID: art00018
Chroma Scaling and Crispening
  DOI :  10.2352/CIC.2001.9.1.art00018  Published OnlineJanuary 2001

A chroma scaling psychophysics experiment was conducted using a CRT in a dark surround. The experiment consisted of constant hue and lightness IPT step ramps on a uniform background. Each hue step ramp was displayed on an achromatic, a medium and a high chroma background. The results clearly show that chroma scaling is dependent on the chroma of the background. For the medium chroma backgrounds a modest crispening effect is evident. The results also show that chroma scaling on achromatic and high chroma backgrounds differ considerably. The data for the achromatic backgrounds are used to compare C*, C and CF chroma metrics. Additional comparisons using several of the phases of the LUTCHI data demonstrate that C and CF are clearly better than C* and that C has an intercept of roughly 0.1 for a linear fit between normalized scale and metric data. In comparison, CF provides a good fit to the chroma scaling data and an intercept closer to 0.

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Nathan Moroney, "Chroma Scaling and Crispeningin Proc. IS&T 9th Color and Imaging Conf.,  2001,  pp 97 - 101,

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