python练习小项目（持续更新中...）

1 使用python将图片转换成字符画

效果图

image.png

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安装必要的库
pillow(PIL)库是python 图片处理库
$ sudo apt-get update
$ sudo apt-get install python-dev
$ sudo apt-get install libtiff5-dev libjpeg8-dev zlib1g-dev libfreetype6-dev liblcms2-dev libwebp-dev tcl8.6-dev tk8.6-dev python-tk
$ sudo pip install pillow

新建 testAsciiPy.py文件

# -*- coding: utf-8 -*-
# @Time    : 2018/2/17 下午3:41
# @Author  : scl
# @Email   : [email protected]
# @File    : testAsciiPy.py
# @Software: PyCharm

from PIL import Image
import argparse

ascii_char = list("$@B%8&WM#*oahkbdpqwmZO0QLCJUYXzcvunxrjft/\|()1{}[]?-_+~<>i!lI;:,\"^`'. ")

# 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=80) #输出字符画宽
parser.add_argument('--height',type = int, default=80) #输出字符画高

# 获取参数
args = parser.parse_args()

IMG = args.file
WIDTH = args.width
HEIGHT = args.height
OUTPUT = args.output


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__':

    img = Image.open(IMG)
    img = img.resize((WIDTH,HEIGHT),Image.NEAREST)

    txt = ''

    for i in range(HEIGHT):
        for j in range(WIDTH):
            txt += get_char(*img.getpixel((j,i)))

        txt += '\n'

    print(txt)

    if OUTPUT:
        with open(OUTPUT,'w') as f:
            f.write(txt)
    else:
        with open('output.txt','w') as f:
            f.write(txt)

参考资料:https://www.shiyanlou.com/courses/370/labs/1191/document