Color‐appearance model and chromatic‐adaptation transform

Abstract

A nonlinear color‐appearance model was extended to apply to white and light‐gray background. Based on this extended model, two kinds of chromatic‐adaptation transforms were derived, which correspond to lightness‐chroma match and brightness‐colorfulness match. The chromatic‐adaptation transform for lightness‐chroma match is also an extension of the transform proposed by CIE for further testing. The differences between the two transforms were confirmed by visual observations. The usefulness of a combination of a color‐appearance model and its corresponding chromatic adaptation transform is discussed. In addition, the practical importance of brightness and colorfulness is discussed.

Proposal of an abridged color‐appearance model CIECAT94LAB and its field trials

“…23 It is interesting to show whether the predicted results for brightness and colorfulness in the last section agree well with those using the estimation method already reported.…”

“…(21) On the other hand, lightness and brightness correlates at a different fundamental adapting luminance L aR 63.66 cd/m 2 are already given by Eqs. (18) and (23). In the case of L aR Ͻ 63.66, lightness and brightness correlates increase, and vice versa for L aR Ͼ 63.66.…”

“…The ratios of brightness between test and reference colors using the method 23 are shown in Table X for the Breneman subexperiments Nos. 5, 7, and 10.…”

Analyzing the metrics of the perceptual space in a new multistage physiological colour vision model

“…There are two main types of colour vision models: colour appearance models [1][2][3][4][5][6][7] and neural models. [8][9][10][11][12][13][14][15][16][17] Both predict perceptual descriptors, but the difference between them is that neural models also try to follow the stages of the visual system.…”

Improving CNN-Based Texture Classification by Color Balancing

“…light-raw: it performs the correction of the illuminant color, similarly to what is done by color constancy algorithms [5,30,48] and chromatic adaptation transforms [49,50]. The output color representation is still device-dependent, but with the discount of the effect of the illuminant color; 3.…”