如何在Python中读取文件并将其转换为二进制图像

我是Python的新手，我想阅读jpg，png之类的图像.并将其转换为二进制图像.这是我的工作:

I am new to Python, I want to read a image like jpg,png. and convert it to binary image. Here is my work:

from PIL import Image
import numpy



def main( ):
    name= 'b.jpg'

    img= Image.open (name);
    for pixel in iter(img.getdata()):
        print(pixel)

    img.convert("1").show();

    del image;

if __name__=='__main__':
    main()