如何将图片转换成字符画

思路:
1.将图片转换为黑白图
2.遍历所有像素点,建立像素点和字符的映射,保存为一个字符串
3.将字符串输出到文件里面就可以了

代码如下

from PIL import Image 
def getText(img):
    img = img.convert("L")  #转为灰度图片
    charlist = ''
    for h in range(0,img.size[1]):
        for w in range(0,img.size[0]):
            gray = img.getpixel((w,h))  #返回像素值,介于0-255之间256个
            pos = gray/256
            charlist = charlist + codelist[int((count-1)*pos)]  #这里count-1是因为字符串索引是从0开始
        charlist = charlist+'\r\n'  #不同系统对应的换行符不一样\n-windows \r-Linux
    return charlist

def getImage():
    #取得图像
    file = open(u'1.jpg', 'rb')
    img = Image.open(file)
    return img

def trantxt():
    #输出到文本中去
    outfile = open('tmp.txt', 'w')
    outfile.write(getText(img))
    outfile.close()

if __name__ == '__main__':
    img = getImage()
    width, height = img.size[0],img.size[1] #0-width,1-height
    codelist = """qwertyuiop[]asdfghjkl;'zxcvbnm,./`~!@#$%^&<()*+{}:"?> |"""
    count = len(codelist)
    scale = width / height  #宽度与高度的比例,为了维护图像比例不要失真
    img = img.resize((int(width*0.1), int(width*0.1/scale) ))   #这里的0.1可以改成你喜欢的比例
    trantxt()

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