Efficiently evaluating the effect of color gamut and spectral bandwidth on observer metamerism in high dynamic range displays,Journal of the Society for Information Display

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Efficiently evaluating the effect of color gamut and spectral bandwidth on observer metamerism in high dynamic range displays
Journal of the Society for Information Display ( IF 1.7 ) Pub Date : 2021-06-02 , DOI: 10.1002/jsid.1027
Yongmin Park _{1,

2} , Michael J. Murdoch ₁

Affiliation

Observer metamerism (OM), which likely causes potential issues in high dynamic range (HDR) displays due to those formidable peak luminance and color gamut required, is examined in this work using simulations. The simulations focus on investigating how OM in HDR displays would vary with chromaticity gamut and peak luminance level changes, proposing a new OM index, OMM. The effects of additional factors noteworthy on OM, such as reference white level, age, and spectral characteristics, are discussed. Finally, a simple metric capable of predicting observer metamerism between displays with less computational complexity, OMM_N, is introduced. The simulation results showed that observer metamerism magnitudes between displays tend to depend on the similarity in spectral bandwidth between paired displays, in addition to the fact that narrow-band primary displays generally cause larger metameric failures. Besides, the effect of changes in peak luminance on observer metamerism was found to be relatively small, increasing OMM by 7%–8% when peak luminance doubles. Notably, the proposed efficient metric OMM_N outperforms metrics based on spectral similarity by also factoring in inter-observer variability. In addition, the proposed metric's performance with 10 categorical observers, OMM_N, 10, is nearly as good as that with thousands more computations. OMM_N, 10 is recommended as a reliable and efficient metric to evaluate OM between HDR displays.

中文翻译：

有效评估色域和光谱带宽对高动态范围显示器中观察者同色异谱的影响

观察者同色异谱 (OM) 可能会导致高动态范围 (HDR) 显示中的潜在问题，因为需要那些强大的峰值亮度和色域，在这项工作中使用模拟进行了检查。模拟的重点是研究 HDR 显示器中的 OM 如何随色度域和峰值亮度水平变化而变化，并提出了一个新的 OM 指数 OMM。讨论了其他值得注意的因素对 OM 的影响，例如参考白电平、年龄和光谱特征。最后，一个简单的度量标准，能够以较低的计算复杂度预测显示器之间的观察者同色异谱，O M M _N，介绍。仿真结果表明，显示器之间的观察者同色异谱幅度往往取决于配对显示器之间光谱带宽的相似性，此外窄带主显示器通常会导致更大的同色异谱故障。此外，发现峰值亮度变化对观察者同色异谱的影响相对较小，当峰值亮度加倍时，OMM 增加 7%–8%。值得注意的是，通过考虑观察者间的可变性，所提出的有效度量O M M _N优于基于光谱相似性的度量。此外，建议的指标在 10 个分类观察者的情况下的表现，O M M _N，10, 几乎与经过数千次计算的结果一样好。推荐使用 O M M _{N , 10}作为评估 HDR 显示器之间的 OM 的可靠且有效的指标。

更新日期：2021-06-02

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