Field trials of the chromatic-adaptation trans-transform hereafter. However, the subject of chromatic adaptation is one of the very difficult topics in color sci-form provided by CIE Technical Report No. 109(1994) was conducted on the basis of the CSAJ, the Breneman, ence and engineering similar to the color-difference study, in which continuous efforts have been made to improve and the McCann experiments. In the study, a concept of common normalized illuminant and illuminance, indepen-CIELUV and CIELAB color difference formulas to adapt them to various practical observations. Similar to the dent of various illuminants and illuminances used in the actual experiments, is newly introduced in the predictions.
color-difference study, at present continuous studies are still going on within CIE Division 1 for improving the This concept made it possible to compare the various experimental results done under different illuminations CIE chromatic-adaptation transform or for deriving a transform better than the present one. This article also at the common normalized condition. The function of the CIE chromatic-adaptation transform using this concept follows this line.
The main purpose of the present article is to describe of normalization becomes very similar to that of the nonlinear color-appearance model. In addition, the effective the concept of the normalized illumination (illuminant and illuminance) and to give its computational procedures adaptation coefficient a min already proposed by the authors is confirmed as effective in the case of the CIE to the CIE chromatic-adaptation transform. However, this concept and the procedure are applicable or should be chromatic-adaptation transform. The transform predicts the above three kinds of experiments nicely. α§ 1998 John used for any other chromatic-adaptation transforms. For example, consider the chromatic-adaptation experi-