char_picture.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# @Time : 2020/12/1
# @Author : AlexZ33
# @Site : 
# @File : char_picture.py
# @description: Python实现图片转换为字符画。用Python将彩色的图片经过一系列的操作后，可以变为全是由字符组成的字符画，最后可以输出为txt文件。txt文件可以用文本打开，放大或缩小查看。
# @Software: PyCharm
# @reference: https://blog.csdn.net/wait_nothing_alone/article/details/52901531

from PIL import Image

IMG = "./img/cat.jpg"

WIDTH = 60
HEIGHT = 45

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, g, b, alpha=256):  # alpha透明度
    if alpha == 0:
        return ' '
    length = len(ascii_char)
    gray = int(0.2126 * r + 0.7152 * g + 0.0722 * b)  # 计算灰度
    unit = (256.0 + 1) / length
    return ascii_char[int(gray / unit)]  # 不同的灰度对应着不同的字符
    # 通过灰度来区分色块


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)
    # 写入文件
    with open("output.txt",'w') as f:
        f.write(txt)