Color Selections for Characterization Charts

摘要

Accurate color measurement can be achieved using a trichromatic digital camera if the device is characterized in terms of CIE tristimulus values. A common practical consideration for any characterization method is the choice of the characterization target. The Macbeth ColorChecker DC chart, for example, is widely used for color-characterization tasks. Whereas a great deal of work has been carried out to address which characterization method gives the best performance, rather less work has been carried out to investigate which characterization target is optimum for the characterization process. This paper describes methods to select optimum colors from a large data set of 1269 Munsell colors. The effect of color selection on characterization performance is compared (using a third-order polynomial transform) with performance using the 24 Macbeth ColorChecker chips and 166 chips from the Macbeth ColorChecker DC chart.