Primary Colors
主要颜色
Any set of three colors which when added in appropriate combination will yield white can be considered to be primary colors. It is useful to map color space with a set of primaries like blue, green, and red. If unit amounts of B,G, and R produce white light, then they can be used like unit vectors to define the color space. The coordinates of a point in space defines a color C by
任何一组三种颜色，只要在适当组合下可以产生白光，就可以被视为原色。将原色如蓝、绿和红作为一组原色来映射颜色空间是有用的。如果单位量的B、G和R能产生白光，那么它们可以像单位向量一样用来定义颜色空间。空间中一点的坐标定义了颜色C。
The coordinates B, G, and R are called the tristimulus values with respect to that set of primaries. Early research was done with a specific set of RGB primaries. The same color can be quantitatively matched to the CIE primaries and expressed in terms of the CIE chromaticity coordinates.
B、G 和 R 这三个坐标被称为相对于那组基色的三刺激值。早期的研究是基于特定的 RGB 基色进行的。同样的颜色可以定量地匹配到 CIE 基色，并用 CIE 色度坐标来表示。
索引
HyperPhysics ***** 光与视觉
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