提出了一种将彩色图像进行空间滤波的方法，通过分光路设计把原彩色图像分为三原色，并分别进行频谱分解。利用空间滤波，可突出所需要的信息成份，经合成可完成对彩色图像的信息处理，并给出了理论证明。 A method for spatial filtering of color image is proposed. The original color image is divided into three primary colors by spectral path design, and the spectrum is decomposed separately. The use of spatial filtering, you can highlight the required information components, the synthesis can be completed on the color image information processing, and gives a theoretical proof.