          return new_image
  
      def get_image_mask(self, detected_face, image_size):
          """ Get the image mask """
          mask = self.mask.get_mask(detected_face, image_size)
          if self.args.erosion_size != 0:
              kwargs = {'src': mask,
                        'kernel': self.set_erosion_kernel(mask),
 
</s> remove                     "\ncnn: Not yet implemented"})
 </s> add                     #  "\ncnn: Not yet implemented"  Removed until implemented
                    "\nnone: No mask. Can still use blur and erode on the edges of the swap box."}) </s> remove                     "\nfacehull_rect: Rectangle around faces with facehull"
                    "\n\tbetween the edges of the face and the background."
 </s> add  </s> remove                     "\nsmoothed: Rectangle around face with smoothing."
 </s> add 
    @staticmethod
    def smooth_box(old_face, new_face):
        """ Perform gaussian blur on the edges of the output rect """
        width, height, _ = new_face.shape
        crop = slice(0, width)
        mask = np.zeros_like(new_face)
        mask[height // 15:-height // 15, width // 15:-width // 15, :] = 255
        mask = cv2.GaussianBlur(mask,  # pylint: disable=no-member
                                (15, 15),
                                10)
        new_face[crop, crop] = (mask / 255 * new_face +
                                (1 - mask / 255) * old_face)

          return new_image
  
    @staticmethod
    def smooth_box(old_face, new_face):
        """ Perform gaussian blur on the edges of the output rect """
        width, height, _ = new_face.shape
        crop = slice(0, width)
        mask = np.zeros_like(new_face)
        mask[height // 15:-height // 15, width // 15:-width // 15, :] = 255
        mask = cv2.GaussianBlur(mask,  # pylint: disable=no-member
                                (15, 15),
                                10)
        new_face[crop, crop] = (mask / 255 * new_face +
                                (1 - mask / 255) * old_face)

      def get_image_mask(self, detected_face, image_size):
          """ Get the image mask """
          mask = self.mask.get_mask(detected_face, image_size)
          if self.args.erosion_size != 0:
              kwargs = {'src': mask,
                        'kernel': self.set_erosion_kernel(mask),
keep add keep keep keep keep keep keep
 Add adjust's 'smooth-mask' (smooth-box) back as option 
plugins/convert/masked.py