Python实现图片转字符画的代码实例

# !/usr/bin/env python# -*- coding:utf-8 -*-from PIL import Imageimport argparse#命令行输入参数处理parser = argparse.ArgumentParser()parser.add_argument('file')   #输入文件parser.add_argument('-o', '--output')  #输出文件parser.add_argument('--width', type = int, default = 50) #输出字符画宽parser.add_argument('--height', type = int, default = 50) #输出字符画高#获取参数args = parser.parse_args()IMG = args.fileWIDTH = args.widthHEIGHT = args.heightOUTPUT = args.output# 字符画使用的字符集ascii_char = list("$@B%8&WM#*oahkbdpqwmZO0QLCJUYXzcvunxrjft//|()1{}[]?-_+~<>i!lI;:,/"^`'. ")def get_char(r,g,b,alpha = 256):  """将256灰度映射到70个字符上"""  if alpha == 0:    return ' '  length = len(ascii_char)  # 计算灰度的公式  gray = int(0.2126 * r + 0.7152 * g + 0.0722 * b)  unit = (256.0 + 1)/length  index=int(gray/unit)  return ascii_char[index]if __name__ == '__main__':  im = Image.open(IMG)  im = im.resize((WIDTH,HEIGHT), Image.NEAREST)  txt = ""  # 获取每个像素点对应的字符  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)z