1． 利用二进制流读取Bitmap位图文件； 2． 把读取彩色图像转换成灰度图像； 3． 提取并且显示彩色图像各个色彩通道；-1. Using the binary stream to read Bitmap bitmap file 2. To read the color image is converted into grayscale images 3. Extracting and displaying a color image of each color channel