The colour hexagon: a chromaticity diagram based on photoreceptor excitations as a generalized representation of colour opponency
The colour hexagon: a chromaticity diagram based on photoreceptor excitations as a generalized representation of colour opponency
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DOI：
10.1007/bf00199331
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发表时间：
1992-06
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影响因子：
--
通讯作者：
L. Chittka
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文献类型：
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作者：
L. Chittka
本文给出了三基色视觉系统在120°角下的三种感光激发的色度图。它考虑了受体中的非线性转导过程。得到的图表有一个等边六角形的轮廓。用几何方法证明，如果任何类型的光谱对抗机构的权重因子之和为零，则可从该图中读出该机构的激振值。因此，它也可以被认为是颜色对立关系的一般表示，以图形方式将杨-亥姆霍兹的三原色理论和赫林的对立颜色概念联系在一起。它显示在一个几何图形上。在此基础上，色度可以由任何两个组合的光谱对立机制明确地编码，特定机制之间的主要区别是特定光谱区域的扩展和压缩。这种图形表示可以定性地解释Bezold-Bruücke现象。此外，颜色六边形距离可作为三色昆虫感知颜色距离的标准化数值，并与3种膜翅目昆虫的行为颜色辨别数据进行了比较。
A chromaticity diagram which plots the 3 photoreceptor excitations of trichromatic colour vision systems at an angle of 120° is presented. It takes into acount the nonlinear transduction process in the receptors. The resulting diagram has the outline of an equilateral hexagon. It is demonstrated by geometrical means that excitation values for any type of spectrally opponent mechanism can be read from this diagram if the weighting factors of this mechanism add up to zero. Thus, it may also be regarded as a general representation of colour opponent relations, linking graphically the Young-Helmholtz theory of trichromacy and Hering's concept of opponent colours. It is shown on a geometrical. basis that chromaticity can be coded unequivocally by any two combined spectrally opponent mechanisms, the main difference between particular mechanisms being the extension and compression of certain spectral areas. This type of graphical representation can qualitatively explain the Bezold-Brücke phenomenon. Furthermore, colour hexagon distances may be taken as standardized perceptual colour distance values for trichromatic insects, as is demonstrated by comparison with behavioural colour discrimination data of 3 hymenopteran species.