The achromatic locus: Effect of navigation direction in color space
The achromatic locus: Effect of navigation direction in color space
复制标题
DOI：
10.1167/14.1.25
复制
发表时间：
2014-01-01
影响因子：
1.8
通讯作者：
Wuerger, Sophie
中科院分区：
文献类型：
--
作者：
Chauhan, Tushar;Perales, Esther;Wuerger, Sophie
消色差刺激被定义为一块没有任何色调的光。这通常是通过要求观察人士调整刺激方案，使其看起来既不是红色也不是绿色，同时也不是黄色或蓝色。尽管消色差轨迹在理论上和实践上都很重要，但人们对这些环境中的变异性知之甚少。本研究的主要目的是评估消色差设置是否依赖于观察者的任务，即颜色空间中的导航方向。观察者可以沿着CIE u*v*图中的两个色轴调整测试补丁，或者沿着唯一色调线导航。我们的主要结果是导航方法影响这些消色差设置的可靠性。当沿着由四种独特色调定义的方向调整测试块时，观察者能够做出更可靠的消色差设置，而不是沿着通常使用的CIE u*v*色度平面中的主轴导航。这一结果适用于不同的环境查看条件(黑暗、日光、冷白荧光)和不同的测试亮度级别(5、20和50 cd/m(2))。消色差设置中的减少的可变性与内部颜色表示比U*和V*轴更符合唯一色调线的想法一致。
An achromatic stimulus is defined as a patch of light that is devoid of any hue. This is usually achieved by asking observers to adjust the stimulus such that it looks neither red nor green and at the same time neither yellow nor blue. Despite the theoretical and practical importance of the achromatic locus, little is known about the variability in these settings. The main purpose of the current study was to evaluate whether achromatic settings were dependent on the task of the observers, namely the navigation direction in color space. Observers could either adjust the test patch along the two chromatic axes in the CIE u* v* diagram or, alternatively, navigate along the unique-hue lines. Our main result is that the navigation method affects the reliability of these achromatic settings. Observers are able to make more reliable achromatic settings when adjusting the test patch along the directions defined by the four unique hues as opposed to navigating along the main axes in the commonly used CIE u* v* chromaticity plane. This result holds across different ambient viewing conditions (Dark, Daylight, Cool White Fluorescent) and different test luminance levels (5, 20, and 50 cd/m(2)). The reduced variability in the achromatic settings is consistent with the idea that internal color representations are more aligned with the unique-hue lines than the u* and v* axes.