A comprehensive color appearance model should be capable of predicting color appearance under a wide range of viewing conditions, including related and unrelated colors. The current CAM16 model was designed to predict the appearance of related colors and is in the process of becoming a CIE recommendation, to replace the current CIECAM02 model. This article describes an extension of CAM16 (named CAM20u) for predicting the brightness, hue quadrature, amount-of-white, and colorfulness attributes of unrelated colors. Its performance, together with that of other unrelated models, was tested based on the three available datasets. The results show that the CAM20u model significantly outperforms the others, especially for colorfulness and amount-of-white.

中文翻译：

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CAM20u：CAM16 的扩展，用于预测无关颜色的颜色外观

一个综合的颜色外观模型应该能够预测各种观看条件下的颜色外观，包括相关和不相关的颜色。当前的 CAM16 模型旨在预测相关颜色的外观，并且正在成为 CIE 推荐标准，以取代当前的 CIECAM02 模型。本文描述了 CAM16（名为 CAM20u）的扩展，用于预测不相关颜色的亮度、色相正交、白色量和色彩属性。基于三个可用数据集对其性能以及其他不相关模型的性能进行了测试。结果表明，CAM20u 模型明显优于其他模型，尤其是在色彩和白色量方面。