python Opencv将图片转为字符画

# -*- coding: utf-8 -*- 
# feimengjuan 
# 实现将图片转为字符画 
 
import cv2 
 
ascii_char = list("$@B%8&WM#*oahkbdpqwmZO0QLCJUYXzcvunxrjft/\|()1{}[]?-_+~<>i!lI;:,\"^`'. ") 
 
# 将灰度值转为字符 
def get_char(gray_number): 
  length = len(ascii_char) 
  unit = (256.0 + 1)/length 
  return ascii_char[int(gray_number/unit)] 
 
if __name__ == '__main__': 
  image1 = cv2.imread('8.jpg') 
  image = cv2.resize(image1,(85,110)) 
  gray = cv2.cvtColor(image,cv2.COLOR_BGR2GRAY) 
  txt = "" 
  for i in range(image.shape[0]): 
    for j in range(image.shape[1]): 
      # 对打开的图片的每个坐标的灰度值做判断， 
      # 用get_char()获取该颜色灰度值对应的字符，然后拼接成字符串txt 
      txt += get_char(gray[i,j]) 
    txt += '\n' 
  print txt 
  #字符画输出到文件中 
  f = open('output.txt','w') 
  f.write(txt)