Python3.4图片转换素描，, from PIL

Python3.4图片转换素描，, from PIL

    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)