图像在读取颜色时，参数较多，处理过程需耗费大量时间，因此通过八叉树颜色聚类算法，提取图像的主色，利于后续的图像处理。(When the color is read, there are many parameters, and the processing process takes a lot of time. Therefore, octree color clustering algorithm is used to extract the main color of the image,