实现读取显示bmp图像,可以根据两幅图像的容差值进行图像处理，并具容差值可以设定，直观对比两幅图像的变化，保存显示处理结果-Achieve read bmp image display can be based on the difference between the two images, the image processing tolerance and a tolerance value can be set to change in visual comparison of the