20行代码将图片生成文字图片

原始图片是这样：

经过处理之后的效果是这样：

代码如下：

from PIL import Image

ascii_char = list("$@B%8&WM#*oahkbdpqwmZO0QLCJUYX
        zcvunxrjft/|()1{}[]?-_+~<>i!lI;:,"^`'. ")

def get_char(r,g,b,alpha = 256):
    if alpha == 0:
        return ' '
    length = len(ascii_char)
    gray = int(0.2126 * r + 0.7152 * g + 0.0722 * b)

    unit = (256.0 + 1)/length
    return ascii_char[int(gray/unit)]

if __name__ == '__main__':

    im = Image.open('IMG_1649.JPG')
    im = im.resize((64, 64))
    w, h = im.size

    txt = ""

    for i in range(h):
        for j in range(w):
            txt += get_char(*im.getpixel((j,i)))
        txt += '
'

    print txt
    with open("out.txt", 'w') as f:
        f.write(txt)

​