Research on Color Space Uniformity Based on New Color Appearance Model CAM16

Xueqiong Bai; Ningfang Liao

doi:10.3788/AOS202040.0433001

Acta Optica Sinica, Volume. 40, Issue 4, 0433001(2020)

Research on Color Space Uniformity Based on New Color Appearance Model CAM16

Xueqiong Bai and Ningfang Liao^*

Key Laboratory of Optoelectronic Imaging Technology and System, Ministry of Education, School of Optics and Photonics, Beijing Institute of Technology, Beijing 100081, China

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Figures & Tables(10)

Fig. 1. Linear regression analysis between color appearance color space lightness J and Munsell value V

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Fig. 2. Distribution of Munsell color sample with V of 5 in color appearance space Jab. (a) Chroma performance of CIECAM02 model; (b) chroma performance of CAM16 model

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Fig. 3. Linear relationship between brightness scale J and ΔJ/ΔV

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Fig. 4. Linearrelationship between chroma scale C and ΔC/ΔV

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Table 1. Brightness correlation coefficient of CIECAM02/CAM16
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Table 1. Brightness correlation coefficient of CIECAM02/CAM16
h 5R 5YR 5Y 5GY 5G 5BG 5B 5PB 5P 5RP
R²(CIECAM02) 0.9954 0.9968 0.9863 0.9912 0.9967 0.9965 0.9967 0.9946 0.9779 0.9971
R²(CAM16) 0.9954 0.9967 0.9862 0.9911 0.9967 0.9966 0.9969 0.9946 0.9784 0.9970

Table 2. Root mean square errors of each chromatic circle deviating from the circle in Jab space
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Table 2. Root mean square errors of each chromatic circle deviating from the circle in Jab space
Model R_MSE STD
1 2 4 6 8 10 12
CIECAM02 1.3175 2.1171 2.9093 4.1734 4.3453 3.7516 4.0099 2.8786
CAM16 1.2780 2.0961 2.7771 3.7994 4.0617 3.5290 5.7325 3.0822

Table 3. Root mean square error of linear regression of the hue lines
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Table 3. Root mean square error of linear regression of the hue lines
h 5R 5YR 5Y 5GY 5G
R_MSE(CIECAM02) 0.6646 0.5799 0.3455 0.2456 0.6258
R_MSE (CAM16) 0.6172 1.3307 0.2796 0.2577 1.2033
h 5BG 5B 5PB 5P 5RP
R_MSE (CIECAM02) 0.1670 0.8909 0.6386 1.4341 0.6142
R_MSE (CAM16) 0.1866 0.7284 1.9092 2.6120 1.1714

Table 4. Comparison of new brightness scales J' and J of CAM16 model
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Table 4. Comparison of new brightness scales J' and J of CAM16 model
Brightness R² R_MSE
J 0.96403 4.0698
J' 0.97417 2.4904

Table 5. Root mean square error of chromatic circle deviating from the circle
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Table 5. Root mean square error of chromatic circle deviating from the circle
Model R_MSE STD
1 2 4 6 8 10 12
Jab 1.2780 2.0961 2.7771 3.7994 4.0617 3.5290 5.7325 3.0822
J'a'b' 1.2325 1.7607 1.8869 2.1957 2.0746 1.6682 2.4123 2.6718

Table 6. Root mean square error of linear regression of hue lines
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Table 6. Root mean square error of linear regression of hue lines
h 5R 5YR 5Y 5GY 5G
R_MSE(Jab) 0.4973 1.1043 0.7632 0.5792 1.2962
R_MSE(J'a'b') 0.6646 0.5799 0.3455 0.2456 0.6258
h 5BG 5B 5PB 5P 5RP
R_MSE(Jab) 0.1974 0.8606 0.9757 2.3827 1.1240
R_MSE(J'a'b') 0.1670 0.8909 0.6386 1.4341 0.6142

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Xueqiong Bai, Ningfang Liao. Research on Color Space Uniformity Based on New Color Appearance Model CAM16[J]. Acta Optica Sinica, 2020, 40(4): 0433001

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