说明：  创建了图像类的框架，在该类中，实现图像的读入、保存、显示，并实现图像的翻转、缩放、裁剪等操作。在主程序中，读入某个图像文件（比如“fruits.jpg”） ，对其进行缩小，上下翻转，左右翻转，指定区域裁剪等操作。
(Create a framework of the image class, in this class, to achieve the image read, save, display, and to achieve the image flip, zoom, crop and other operations. In the main program, read an image file (such as "fruits.jpg"), to narrow it, flip up and down, left and right flip, specify the region cut and other operations.)