This study investigated that which of the available color spaces performs best in different aspects when encoding high dynamic range and wide gamut color difference signals. Six different color spaces including CIELAB, CIELUV, CAM16-UCS, ICtCp, ICaCb, and zICaCb (current modification of ICaCb), were investigated for their performance in terms of local and global uniformity, hue linearity, encoding of Rec.2020 signals, convergence of iso-hue lines at single point (locus), distance between locus and origin, and computational cost. A new metric was developed for hue linearity test. Comprehensive testing was performed using the most reliable datasets and some modifications were proposed in the recently developed color space named ICaCb. Results showed that the current zICaCb outperformed other spaces tested for most of the measures and gave similar performance for other measures.
Muhammad Safdar, M. Ronnier Luo, Guihua Cui, "Investigating Performance of Uniform Color Spaces for High Dynamic Range and Wide Gamut Color Difference Applications" in Proc. IS&T 24th Color and Imaging Conf. , 2016, https://doi.org/10.2352/ISSN.2169-2629.2017.32.88