本源码正对的是8位的灰度bmp图片，可以通过读取bmp图片总各个像素点的灰度级，并将将图像灰度保存在文本文档中-The source is on an 8-bit grayscale bmp picture, you can read through the gray level of each pixel bmp image point total, and the image is saved in a text document in grayscale