Python3.4图片转换素描

python">    from PIL import Image, ImageFilter, ImageOps  
    img = Image.open('C:\\Users\\hengli\\Pictures\\lovewallpaper\\214926-106.jpg')  
    def dodge(a, b, alpha):  
        return min(int(a*255/(256-b*alpha)), 255)  
    def draw(img, blur=25, alpha=1.0):  
        img1 = img.convert('L')        #图片转换成灰色  
        img2 = img1.copy()  
        img2 = ImageOps.invert(img2)  
        for i in range(blur):          #模糊度  
            img2 = img2.filter(ImageFilter.BLUR)  
        width, height = img1.size  
        for x in range(width):  
            for y in range(height):  
                a = img1.getpixel((x, y))  
                b = img2.getpixel((x, y))  
                img1.putpixel((x, y), dodge(a, b, alpha))  
        img1.show()  
        #img1.save('C:\\Users\\hengli\\Pictures\\CameraMan\\照片1.png')  
    draw(img)  

标签：python