Test Criteria and Investigation of Uniform Color Spaces to Meet the Requirements of Future Imagery

摘要

The television and cinema industry has grown very rapidly during last few years and future displays will likely be able to cover high dynamic range (HDR) and wide color gamut (WCG). A uniform color space is desired that is suitable not only for efficient quantization but also for color volume mapping in HDR and WCG environment. A design goal for the next generation display is Rec.2020 which is the minimum requirement for future video encoding. There are a number of aspects which must be considered while developing a color space in order to meet the requirements of future imagery. Current study lists eight different criterions to test the ability of a color space to meet these requirements. After defining the testing criteria, this study investigated four different color spaces including CIELAB, CAM16-UCS, ICaCb, and recently proposed zlCaCb. Results showed that zlCaCb outperformed other spaces tested for most of the measures and gave similar performance for others.