Small, supra‐threshold color differences are typically described with Euclidean distance metrics, or dimension‐weighted Euclidean metrics, in color appearance spaces such as CIELAB. This research examines the perception and modeling of very large color differences in the order of 10 CIELAB units or larger, with an aim of describing the salience of color differences between distinct objects in real‐world scenes and images. A psychophysical experiment was completed to compare directly large color‐difference pairs designed to probe various Euclidean and non‐Euclidean distance metrics. The results indicate that very large color differences are best described by HyAB, a combination of a Euclidean metric in hue and chroma with a city‐block metric to incorporate lightness differences.

中文翻译：

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距离差异非常大的距离度量

在色彩外观空间（例如CIELAB）中，通常使用欧几里得距离距离度量标准或维数加权的欧几里得度量标准来描述阈值以上的微小色差。这项研究检查了大约10个CIELAB单位或更大的非常大的色差的感知和建模，目的是描述现实场景和图像中不同对象之间色差的显着性。完成了一项心理物理实验，可以直接比较旨在探测各种欧几里得距离和非欧几里得距离度量标准的较大色差对。结果表明，HyAB可以很好地描述非常大的色差，HueAB是色相和色度的欧几里德度量与城市亮度度量的结合，以结合亮度差异。