Performance of CIE Color Matching Functions Tested by Metamerism Reflected Samples

In order to test the performances of CIE recommended color matching functions, including CIE1931, CIE1964, and CIE2006, the visual color differences from young and aged observers in the previous study based on paired-comparison experiments are used to test the performances of CMFs. The results indicate that CIE2006 (22, 4 degrees) and CIE1931 2 degrees are recommended for young and aged observers with the minimum STRESS values, with the most consistent of the calculated color difference Delta E-00 and the visual color difference Delta V of 56 young observers and 40 old observers, respectively. Further, we selected five neutral target colors from RAL K5 color chart with the values ranging from 34.4-71.6, and 16 metamerism samples were prepared by the Epson inkjet printer around each target color sample. The target and compared samples were metamerism sample pairs. 26 young observers were organized to carry out the color difference experiment of the 80 sample pairs with the gray scale method. The results indicate that the computed color differences AE00 from CIE 2006(22, 2) CMFs are accorded with the visual color difference Delta V with the minimum STRESS values, with the observation field of 8. 17 X 16. 26. The existing CIE2006 CMFs are needed to improve in the calculation of large field of view in consideration of the color difference of metamerism reflected samples.