In any standard image, a pixel has a sequence of three Numbers associated with it that dictate the mixture of the red, green, and blue (RGB) channels for the pixel (and therefore the color displayed).
Standard aerial or satellite photographs are three-band datasets consisting of red, green, and blue bands.
标准的天线或卫星照片是三段数据集，其中包含红、绿、蓝段。
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Each of the three standard color-detecting cones in the retina — blue, green and red — can pick up about 100 different gradations of color, Dr. Neitz estimated.