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

ProLab: A Perceptually Uniform Projective Color Coordinate System

“…In addition to the multiplication operations, the transition to proLab requires three division operations versus three applications of the nonlinear transition function in ICaCb family systems. Thus, the computational complexity of the considered systems is almost consistent, while that of CAM16-UCS is approximately 4 times worse [74].…”

“…Whether proLab meets the High Dynamic Range and Wide Color Gamut criteria is a question for a separate study. However, it should be noted that according to [74], CIELAB meets these criteria sufficiently, and the color gamut of proLab is not inferior to that of CIELAB. We already mentioned that computational simplicity is another important feature of proLab.…”

“…The work in [74] introduces 8 criteria that the color coordinate system must meet to fulfill the requirements of ITU-R Recommendation BT.2020 for modern television devices. These criteria include (i) Local Uniformity, (ii) Global Uniformity, (iii) High Dynamic Range, (iv) Wide Color Gamut, (v) Hue Linearity, (vi) Neutral Point Convergence, (vii) Neutral Point (Locus) Error, and (viii) Computational Cost.…”