Effect of color gamut and luminance on observer metamerism in HDR displays

Yongmin Park,Michael J Murdoch

doi:10.2352/issn.2169-2629.2020.28.38

Abstract

Observer metamerism (OM) is one of the potential issues in HDR displays because of the required wide color gamuts and high peak luminance levels. A simulation was performed using hypothetical displays to investigate how OM in HDR displays would vary with changes in color gamuts and peak luminance levels. In this work, a robust metric, observer metamerism magnitude (OMM) is introduced, which quantifies the OM of paired displays, depending on the similarity in spectral bandwidth between them. Also, the effect of changes in peak luminance on OM was found to be small, increasing OMM by 7 ∼ 8 % when peak luminance doubles.

Highlights

Observer metamerism (OM) refers to the phenomenon that color matches for one observer do not hold for another observer under the same viewing condition
The simulations were performed to understand how OM varies with expansions in chromaticity gamut and increases in peak luminance using the hypothetical displays covering 8 different chromaticity gamuts with peak luminance levels of 500, 1,000, 2,000, and 4,000 cd/m2
The simulations using the pairwise comparison method resulted in observer metamerism magnitude (OMM) indices of 28 pairs of displays for each peak luminance level

Summary

Introduction

Observer metamerism (OM) refers to the phenomenon that color matches for one observer do not hold for another observer under the same viewing condition. This phenomenon is intrinsically attributed to the fact that human color vision differs from person to person [1]. Various studies pointed out that narrow-band primary displays would increase the possibility of metameric failures [1, 2, 3], and it can be a severe issue in color critical applications, for example, color grading. This paper introduces a simulation-based analysis to look into the effect of color gamut changes on OM in HDR displays. The significance of the effect of peak luminance changes on OM is presented

Methods

Results

Conclusion