python3图片转化成字符画

from PIL import Image  # 安装 见https://www.cnblogs.com/yuzhen0228/p/13330536.html

ascii_char = list("$@B%8&WM#*oahkbdpqwmZO0QLCJUYXzcvunxrjft/|()1{}[]?-_+~<>i!lI;:,"^`'. ")  # 字符从深到浅
length = len(ascii_char)
img = Image.open('demo.png')
(width, heigth) = img.size
img = img.resize((int(width * 0.1), int(heigth * 0.05)))  # 缩小，便于字符画的展示
print(img.size)  # 打印字符画的宽和高


def covert(img):
    # img = img.convert("L")  # 彩图直接灰度化
    txt = ""
    imode = list(img.getbands())
    print(imode[-1])
    for i in range(img.size[1]):  # 高，也就是行
        for j in range(img.size[0]):  # 宽，也就是列
            if imode[-1] == 'A':
                r,g,b,a = img.getpixel((j, i))
            else: # imode[-1] == 'B'
                r,g,b = img.getpixel((j, i))
            gray = int(r*0.299+g*0.587+b*0.114)  # 得到该点的灰度   详情 https://blog.csdn.net/xdrt81y/article/details/8289963
            txt += ascii_char[int(gray * (length-1)/256)]  # 不同灰度分散到字符列表中的每个字符
        txt += '
'  # 表示做完一行了
    return txt


txt = covert(img)
f = open('demo.txt', 'w')
f.write(txt)
f.close()