matlab图像处理 ，减少颜色数目后的trees图像，抖动前后的效果图像，转换为YCbCr格式后的图像效果，转换为HSV颜色空间后的效果-matlab image processing, color reduction of the number of trees after the image effects of jitter before and after images, converted to YCbCr format image effects, converted to HSV color space, after the effect of