The new deviate visual functions improving the instrumental estimation on the visual color difference for the metamers with about 1° field size |
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Authors: | Wen‐Guey Kuo Yuh‐Chang Wei Alex Liu Shang‐Ming Lin Yi‐Ting Shu |
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Affiliation: | 1. Department of Textile Engineering, Chinese Culture University, Taipei City, Taiwan 11192, Republic of China;2. Department of Information Communication, Chinese Culture University, Taipei City, Taiwan 11192, Republic of China;3. Department of Material and Textiles, Oriental Institute of Technology, Banciao City, Taiwan 22043, Republic of China;4. Institute of Medicine Engineering, Chung Yuan Christian University, Chung Li City, Taiwan 320, Republic of China |
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Abstract: | Although the CIE1931 and 1964 color matching functions have been used in color specification for decades, many researchers, from Allen in 1970 to Hu and Houser in 2006, have found that there still exists a great visual mismatch on the discrimination of color difference as in terms of the CIE color matching functions. Hence, some significant error would be made on color specification due to employing the CIE1931 and 1964 color matching functions. Therefore, six color difference formulae developed from different experimental methods are used to derive various deviate visual functions (DVFs) respectively, and to investigate the effect of these DVFs on the performance of the color difference formulae tested in estimating visual color difference. The results indicate that the performance of the color difference formulae in estimating color difference is significantly improved by the deviate visual functions derived in this study. The CIE94 color difference formula has the best performance in predicting the total visual color difference (ΔVT) using the DVFs and DVFIIs having the mean values 29 and 27 in PF/4 unit, respectively, while the CMC(l:c) the worst the ones 37 and 38. © 2009 Wiley Periodicals, Inc. Col Res Appl, 34, 115–127, 2009 |
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Keywords: | deviate visual functions color management color difference estimation color matching functions color specification |
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