Assessing hue constancy using gradients
نویسنده
چکیده
The lack of blue hue constancy has been identified as a significant shortcoming of the CIELAB color space. The CIECAM97s, CIELUV, IPT and MLab color spaces have been proposed as alternatives to CIELAB. Color gradients with fixed anchor values were used as stimuli in a visual experiment. This allowed an efficient comparison of the hue constancy of different color spaces. The results show that IPT, MLab and CIECAM97s are better than CIELUV and CIELAB in the blue regions of color space. There are minimal differences between the color spaces for other hue angles. However, there are still differences in lightness and chroma for the different color spaces that should be further investigated. Finally, the blue constancy of CIELAB is considerably improved by converting to Hunt-Pointer-Estevez cone fundamentals before applying the standard CIELAB equations.
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