读入一个标准图像格式文件（JPG,BMP,TIFF等）并显示出来。利用直方图技术实现图像的增强并存储这幅图像。比较与原图像的区别 -read into a standard image format (JPG, BMP, TIFF, etc.) and displayed. Histogram using technology to enhance the image and image storage site. Comparison with the difference between