python实现图片转化成可读文件

更多参考 机器学习实战-手写数字识别
废话不多说直接上代码：

#-*- 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 = 28) #输出字符画宽parser.add_argument('--height', type = int, default = 28) #输出字符画高#获取参数args = parser.parse_args()IMG = args.fileWIDTH = args.widthHEIGHT = args.heightOUTPUT = args.outputascii_char = list("10")# 将256灰度映射到70个字符上def get_char(r,g,b,alpha = 256):    if alpha == 0:        return ' '    length = len(ascii_char)    gray = int(0.2126 * r + 0.7152 * g + 0.0722 * b)    unit = (256.0 + 1)/length    return ascii_char[int(gray/unit)]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)    #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)

示例图片

命令行示例