说明：  数字图像处理，颜色模型，对图像进行颜色转换
(Given a color image ‘football.jpg’. 1) Display the three component images: red, green and blue. 2) Perform histogram equalization for the original image in RGB color space, and display the result. 3) Convert RGB to HSV, equalize just V component of HSV image, convert the processing result back to RGB, and then display it. 4) Discuss and compare these results. )