python图片转字符

首先安装pip
$ sudo apt-get install python-pip python-dev build-essential

$ sudo pip install –upgrade pip

$ sudo pip install –upgrade virtualenv

#coding=utf-8
#灰度值公式：灰度值 ＝ 0.2126 * r + 0.7152 * g + 0.0722 * b

from PIL import Image
import argparse

#获取参数
IMG = '/home/xuhang/桌面/new/python小程序/画转字符/1.png'
WIDTH = 80
HEIGHT = 60
OUTPUT = '/home/xuhang/桌面/new/python小程序/画转字符/p2c.txt'
#所用的字符
ascii_char = list("$@B%8&WM#*oahkbdpqwmZO0QLCJUYXzcvunxrjft/\|()1{}[]?-_+~<>i!lI;:,\"^`'. ")


# 将256灰度映射到70个字符上
def get_char(r,b,g,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)
    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

   # 字符画输出到文件
    if OUTPUT:
        with open(OUTPUT,'w') as f:
            f.write(txt)
    else:
       with open("output.txt",'w') as f:
            f.write(txt)

原图：

结果

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