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如何把刘看山 Python 化？[编程的日常]

 3 years ago
source link: https://zhuanlan.zhihu.com/p/61312372
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如何把刘看山 Python 化？[编程的日常]

☑编程 ☑读书 ☑翻译 ☑太极

看到一个问题，问如何把刘看山 Python 化？这个有点意思，想想也好久没动过 Python 了，就来个字符画风格的刘看山吧。先上图：

v2-34f1a2de58e164f77717ee88a8cd863f_720w.jpg

具体代码：

# by gua


from PIL import Image


class Iamge2ASCIIArt():
    """Convert image to ASCII Art"""

    def __init__(self, art_char, image_path):
        self.__art_char = art_char
        self.__image_path = image_path

    def __rgb2lib(self, r, g, b):
        return int(0.212671*r + 0.715160*g + 0.072169*b)

    def __fetch_char(self, r, g, b):
        gray = self.__rgb2lib(r, g, b)
        gray_width = 256 / len(self.__art_char)

        return self.__art_char[int(gray/gray_width)]

    def __get_image(self):
        return Image.open(self.__image_path)

    def __resize_iamge(self, img, percent):
        width, height = int(img.size[1]*percent), int(img.size[0]*percent)
        
        return img.resize((width, height))

    def do(self):
        img = self.__get_image()
        img = self.__resize_iamge(img, 0.1)
        width, height = img.size

        for h in range(height):
            text = ""
            for w in range(width):
                r, g, b = img.getpixel((w, h))
                text += self.__fetch_char(r, g, b)
            if h == height-10:
                text = text[0:height//4] + " 人生苦短，我用 Python " + text[height//4+23:]
            print(text)


if __name__ == '__main__':
    lks = Iamge2ASCIIArt("#*.@&+", "./user_avatar 07.png")
    lks.do()

解释：

    def __init__(self, art_char, image_path):
        self.__art_char = art_char
        self.__image_path = image_path

这里初始化字符画要用到的各个字符，是一个字串。同时初始化待处理图像的路径。

    def __rgb2lib(self, r, g, b):
        return int(0.212671*r + 0.715160*g + 0.072169*b)

RBG 模式转换为 Lib 模式，Lab 模式是将图片转换成灰度图时经常用到的。

    def __fetch_char(self, r, g, b):
        gray = self.__rgb2lib(r, g, b)
        gray_width = 256 / len(self.__art_char)

        return self.__art_char[int(gray/gray_width)]

根据获得的灰度，及计算出来的灰度区间宽度，获取字串中对应的字符并作用于字符画。

    def __get_image(self):
        return Image.open(self.__image_path)

获取图像。

    def __resize_iamge(self, img, percent):
        width, height = int(img.size[1]*percent), int(img.size[0]*percent)

resize 图片大小。

    def do(self):
        img = self.__get_image()
        img = self.__resize_iamge(img, 0.1)
        width, height = img.size

        for h in range(height):
            text = ""
            for w in range(width):
                r, g, b = img.getpixel((w, h))
                text += self.__fetch_char(r, g, b)
            if h == height-10:
                text = text[0:height//4] + " 人生苦短，我用 Python " + text[height//4+23:]
            print(text)

处理字符画的生成及打印。

刘看山的头像包在这里下载：

喜欢就点赞，再喜欢就赞赏^_^


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