使CImage保存jpeg图片时能设置质量，具体操作是在atlimage.h文件中增加SaveJpeg函数，具体实现见文件，和系统的atlimange.h比对一下就知道改了哪里，如果用替换的方法，记得先备份原始文件。-CImage save JPEG images can set the quality, the specific operation is to increase the atlimage.h file in the SaveJpeg file, the specific realization of the file, and the system s atlimange.h than to know where to change, if you use the method of replacement, remember to back up the original file.