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Analysis of color volume of multi‐chromatic displays using gamut rings
Author(s) -
Masaoka Kenichiro,
Jiang Fu,
Fairchild Mark D.,
Heckaman Rodney L.
Publication year - 2020
Publication title -
journal of the society for information display
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 52
eISSN - 1938-3657
pISSN - 1071-0922
DOI - 10.1002/jsid.852
Subject(s) - gamut , spectral color , hue , lightness , primary color , brightness , rgb color model , chromatic scale , color balance , magenta , cyan , computer science , artificial intelligence , color difference , color space , color depth , computer vision , color model , rgb color space , chromaticity , optics , color image , physics , image processing , image (mathematics) , enhanced data rates for gsm evolution , inkwell , speech recognition
There are claims that multi‐chromatic displays can achieve a wider color gamut by the use of additional highly saturated secondary color channels. However, there are other claims that these displays lose lightness and/or color saturation at brighter levels. These apparently divergent views have led to some controversy in the display industry and at standard setting organizations. This study examines the color gamut volume for a variety of simulated and measured multi‐chromatic (sometimes incorrectly referred to as “multi‐primary”) displays using combinations of white and/or secondary color channels, such as cyan, magenta, and yellow. Furthermore, a two‐dimensional gamut representation, referred to as “gamut rings,” is introduced to illustrate that the addition of nonprimary optical color channels to a trichromatic (RGB) display can result in a significant decrease in the chroma at higher lightness levels. The additional saturated color channels can increase the gamut volume only around their hues at darker levels. The results also confirm the validity of comparing the color light output and white light output for revealing the design trade‐offs between the high‐peak white and the color‐image brightness for multi‐chromatic displays.