The projective histograms of hue and saturation discribe the color distribution in space, and the projective histogram of intensity reflects the shape of the image.

色调和饱和度的投影直方图反映了颜色的空间分布，而亮度的投影直方图则体现了图像的形状。

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Information rate of image can be calculated by information-theory when intensity distribution of an image is connected to its probability distribution.

用概率论解释了图像的强度分布，从而可以根据信息理论计算图像信息量。

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Intensity space distribution near image point of optical system is derived based on the accurate amplitude (therefore the intensity) analytic expression for Fresnel diffraction.

根据准确的菲涅耳衍射振幅和光强解析表达式推导出光学系统像点附近的光强空间分布。

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