MEASURING COLOR-MATCHING FUNCTIONS .2. NEW DATA FOR ASSESSING OBSERVER METAMERISM

The Munsell Color Science Laboratory model and visual colorimeter for collecting color-matching-function data were described in Part I of this-article. The model and instrument have demonstrated results that correlate well with data collected using the National Research Council of Canada's Trichromator. Color-matching-function data for 18 observers and 20 repetitions on a single observer have been obtained using the Munsell Color Science Laboratory visual colorimeter. The variability for the single observer for 20 repetitions over a month's time was found to be similar to the uncertainty of matching within a single measurement session. The variability of the 18 observers was found to be much larger. The results were compared with the CIE Standard Deviate Observer. The variability of the CIE Standard Deviate Observer was on the order of the single observer variability while the multiple observer variability was significantly larger.