A method for optimising settings of colour primaries for wide colour gamut displays

Recently, wide colour gamut displays which adopt highly saturated primaries of red, green, blue have been rapidly applied. These displays can evoke more vivid and more pleasing effects for images. However, images shown on these newly developing wide gamut devices cannot achieve preferred quality under the control of conventional signal standards that are developed based on smaller colour gamut. To achieve the preferred display effects on wide gamut devices in digital image reproduction, a whole procedure to optimise gamut settings of colour primaries were proposed, in which particular algorithms were designed to render images from signal standard such as sRGB via simulating various gamut settings on the given display. Thus, the optimum specifications of colour primaries can be determined by calculations of the proposed preference index. Furthermore, a psychophysical experiment along with a detailed discussion were carried out as a verification, in which the consistence between the preference index calculation and the visual data could certify the effectiveness of the proposed procedure and algorithms. This study may help display researchers and manufactories by supporting some recommendations to determine the primaries of wide gamut devices in applications.