Perceptually optimal boundaries for wide gamut TVs

Abstract

Displays are coming on the market that can produce a larger range of colors over EBU and this has led to much research on the topic of how to use the additional color gamut volume provided by the displays. Some research has focused on different methods to map colors from small to large gamuts, whereas this paper focuses on defining the required gamut boundaries for natural content. Two gamuts were created from the results of a psychophysical experiment that asked observers to choose their preferred image in terms of saturation. One gamut corresponded to the median value of their choices and the second gamut corresponded to the 90% value of their choices. The results indicated that even at the 90% value, the resulting gamut was smaller than that of the wide-gamut display for most hues and actually closer to EBU for some hues. These results are display independent, at least when considering modern displays that can reach luminance values above 250cd/m 2 .

Effects of display properties on perceived color‐gamut volume and preference

“…Although Fedorovskaya et al 6 and Shimada et al 7 investigated the color appearance and image quality when varying the chroma of images or color gamut of a display, their investigations do not correspond to the extended gamut and large-screen displays of today. The current studies of Laird and Heynderickx 8 and Hisatake et al 9 also indicate that the preferred gamut or optimal limit of chromaticities were smaller than that of the wide-gamut display from observers' preferred saturation in natural images. Yet, while these displays express vivid, clear colors colorimetrically and photometrically, there is little research on how humans perceive these extended-gamut displays.…”

Relationship between mode‐boundary from surface color to fluorescent appearance and preferred gamut on wide‐gamut displays

“…From the questionnaire, for the R hue, we found it came from a perception of fluorescent and unnatural, the same as in previous work. 5…”

“…The method of experiment was similar to that of previous studies. 5,6 The observers adjusted the saturation of the target region to be the most preferred color. The observers could increase or decrease saturation and chose the most preferred one in the end.…”

Subjective evaluation of natural high‐saturated images on a wide gamut display

“…Previous studies on wide color gamut displays have mainly focused on the preferred chroma of natural images . For example, Murdoch et al investigated preferred levels of chroma using an RGB wide gamut display.…”

“…Previous studies on wide color gamut displays have mainly focused on the preferred chroma of natural images. [2][3][4][5][6] For example, Murdoch et al 4 investigated preferred levels of chroma using an RGB wide gamut display. In the study, natural images with very narrow hue ranges were used, and subjects' task was to select the level of colorfulness that they preferred for each image by changing their CIELAB chroma values.…”