Color gamut mapping between small and large color gamuts: part II. gamut extension

A wide color gamut (WCG) display has great color rendering capability and offers the opportunity to achieve a pleasing and realistic appearance in terms of image quality. To take full advantage of the large display gamut, a new gamut extension algorithm (GEA) is proposed based on a new color appearance scale, vividness. The performance of the new GEA was investigated via a psychophysical experiment together with five commonly used GEAs. In addition, two different uniform color spaces (UCSs) were also studied including the CAM02-UCS color space and a space, J(z)a(z)b(z), designed for high dynamic range (HDR) and WCG applications. The results showed that the newly proposed GEA. i.e. the vividness-extension (VE) algorithm, outperformed all the other GEAs and the J(z)a(z)b(z) space was a promising UCS for evaluating gamut extension. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement