python+opencv将图片转为字符图片，并保存txt

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# -*- 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;:,\"^`'. ") 
ascii_char = list(" -/1") 
  
# 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('F:\\video\\qiaobusi.png') 
    image = cv2.resize(image1,(100,40)) 
    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)

源图：

效果图：