Vision is the science that informs us about the biological and evolutionary algorithms that our eyes, opticnerves and brains have chosen over time to see. This article is an attempt to solve the problem of colour to grey conversion, by borrowing ideas from vision science. We introduce an algorithm that measures contrast along the opponent colour directions and use the results to combine a three dimensional colour space into a grey. The results indicate that the proposed algorithm competes with the state of art algorithms.
Ali Alsam, "Opponent Center-Surround Contrast: Colour to Grey Conversion" in Proc. IS&T London Imaging Meeting 2020: Future Colour Imaging, 2020, pp 105 - 108, https://doi.org/10.2352/issn.2694-118X.2020.LIM-18