图片转字符串

#!/usr/bin/env.python  
# _*_ coding: utf-8 _*_

from PIL import Image
import  argparse

parse = argparse.ArgumentParser()

parse.add_argument(‘file‘)
parse.add_argument(‘-o‘,‘--output‘)
parse.add_argument(‘--width‘,type= int ,default= 80)
parse.add_argument(‘--height‘,type=int ,default= 80)

args = parse.parse_args()

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

ascii_char = list("$@B%8&WM#*oahkbdpqwmZO0QLCJUYXzcvunxrjft/\|()1{}[]?-_+~<>i!lI;:,\"^`‘. ")
# 获得字符串的颜色
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)   # 将RGB颜色赋值给灰度值，固定公式。灰度值公式将像素的 RGB 值映射到灰度值
    unit = (256.0 + 1)/length
    return ascii_char[int(gray/unit)]

if __name__== ‘__main__‘:

    im= Image.open(IMG)
    im= im.resize((WIDTH,HEIGHT),Image.NEAREST)
    txt = ""
    for i in range(HEIGHT):             #按照高宽循环。打印一张图片，前后无所谓。
        for j in range(WIDTH):
            txt += get_char(*im.getpixel((j,i)))    #im.getpixel(())  返回给定位置的像素值,这一点的RGB，三位数。然后用灰度值显示。
        txt += ‘\n‘
    print(txt)
    if OUTPUT:
        with open(OUTPUT,‘w‘) as f:    
            f.write(txt)
    else:
        with open(r"C:\Users\HBX\Documents\staudy\output.txt",‘w‘) as f:    #输出文件到本地文件夹。
            f.write(txt)