提取自然图像的区域特征，先是对图像进行下采样进行降维，然后彩色图像三通道对每一个通道进行提取颜色信息。-The regional feature of the natural image is extracted, and the image is down-sampled, and then the color image is extracted for each channel.

用简单的程序描述了光束从源平面到焦平面的传输，三维图像，同时表达了坐标和强度等信息(A simple program is used to describe the transmission of the beam from the source plane to the focal plane, the three-dimensional image, and the information of coordinates and intensity.)