2020
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Abstract: CAT02, the most widely used chromatic adaptation transform to characterize the chromatic adaptation mechanism in the human visual system, includes a factor D to characterize the degree of chromatic adaptation. This factor, however, is only determined by the luminance level of the adapting field and surround. This study was designed to investigate how the change of adapting chromaticities and the simultaneous changes of adapting chromaticities and luminance affect the degree of chromatic adaptation and color ap… Show more

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“…It can be observed that the Δ u ′ v ′ values were similar when the physical scene in the left booth was under the light settings with CCT levels greater than 4000 K, especially with D uv below +0.01. This generally corroborates the findings in several past studies that a similar degree of chromatic adaptation happened when viewing a physical scene (e.g., surface colors) under the adapting CCT beyond 5000 K 5,7,9,10,12,13,14 . The light setting having the adjusted image white point to be the closest to the D65 chromaticities had a CCT of 5000 K and a D uv of 0.…”
Section: Discussionsupporting
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“…It can be observed that the Δ u ′ v ′ values were similar when the physical scene in the left booth was under the light settings with CCT levels greater than 4000 K, especially with D uv below +0.01. This generally corroborates the findings in several past studies that a similar degree of chromatic adaptation happened when viewing a physical scene (e.g., surface colors) under the adapting CCT beyond 5000 K 5,7,9,10,12,13,14 . The light setting having the adjusted image white point to be the closest to the D65 chromaticities had a CCT of 5000 K and a D uv of 0.…”
Section: Discussionsupporting
“…Figure 6 shows the 1-SE ellipses fitted based on the chromaticities of the white points of the display adjusted by the observers (note: the ellipse size was scaled to 25%), together with the chromaticities of the corresponding light setting in the left booth. These suggested that the adjustments made by the observers did not have very large variations and they were generally comparable to recent studies, 5,10,13 so the experiment data were reliable.…”
Section: Intra-and Inter-observer Variationssupporting
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“…The proposed equation, D Proposed , was compared with the optimization results, D Optimized , together with the equations from the earlier studies. [19][20]…”
Section: Degree Of Adaptation (D) Functionmentioning
“…The CAM16 performance was also compared using different equation for the degree of adaptation from the earlier studies. [19][20] The standard deviation of the participants' evaluation was denoted at each data point. The mean absolute hue error (ΔH) values over all experimental conditions are listed in Table 9.…”
Section: Proposed Hue Prediction Model (Hpm21) Performance Testmentioning