Hue linearity is an important property of uniform color spaces such that hues perceived to be similar should be located on a straight line, an iso-hue line, in that space. Previously derived hue linearity data only cover a limited color gamut. Two new psychophysical experiments were conducted that used a wide color gamut (WCG) and high dynamic range (HDR) display to extend the color range using both hue matching and unitary hue estimation methods. The new data were used to evaluate the CIELAB, CAM16-UCS, IPT, and Jzazbz uniform color spaces. The experimental results indicated that IPT and Jzazbz outperformed the other two, especially in the blue region. The same method was used to test these spaces using the other published data sets. The results from different data sets gave similar results. Finally, all results were combined to form a normalized data set to represent the data under HDR and WCG display conditions. Furthermore, the four unitary hue data can be used to develop or refine color appearance models.

中文翻译：

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色域的色相线性度适用于宽色域和高动态范围的介质。

色相线性度是均匀色彩空间的重要属性，因此，应将被认为相似的色相放置在该空间中的一条直线上，即等色相线上。先前导出的色相线性数据仅覆盖有限的色域。进行了两个新的心理物理实验，这些实验使用色相匹配和统一色相估计方法，使用了宽色域（WCG）和高动态范围（HDR）显示器来扩展色域。新数据用于评估CIELAB，CAM16-UCS，IPT和Jzazbz均匀色彩空间。实验结果表明，IPT和Jzazbz优于其他两个，尤其是在蓝色区域。使用其他已发布的数据集，使用相同的方法来测试这些空间。来自不同数据集的结果给出了相似的结果。最后，将所有结果组合在一起以形成一个标准化的数据集，以表示HDR和WCG显示条件下的数据。此外，四个统一的色相数据可用于开发或完善颜色外观模型。