Python3 图片转字符画

https://www.shiyanlou.com/courses/370/labs/1191/document

from PIL import Image
import argparse
ascii_char = list("$@B%8&WM#*oahkbdpqwmZO0QLCJUYXzcvunxrjft/\|()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)]
parser = argparse.ArgumentParser()
parser.add_argument('file')
parser.add_argument('-o','--output')
parser.add_argument('--width',type = int,default = 80)
parser.add_argument('--height',type = int,default = 80)
args = parser.parse_args()

IMG = args.file
WIDTH = args.width
HEIGHT = args.height
OUTPUT = args.output

if __name__ == '__main__':
    im = Image.open(IMG)
    im = im.resize((WIDTH,HEIGHT),Image.NEAREST)

    txt = ''

    for i in range(HEIGHT):
        for j in range(WIDTH):
            txt += get_char(*im.getpixel((j,i)))
        txt += '\n' 

    print(txt)

    if OUTPUT:
        with open(OUTPUT,'w') as f:
            f.write(txt)
    else:
        with open('output.txt','w') as f:
            f.write(txt)