  
      def update(self):
          """ Load and unload thumbnails in the visible area of the faces viewer. """
          self._visible_grid, self._visible_faces = self._grid.visible_area
          if (isinstance(self._images, np.ndarray) and
                  self._visible_grid.shape[-1] != self._images.shape[-1]):
              self._recycle_objects()
  
          required_rows = self._visible_grid.shape[1] if self._grid.is_valid else 0
          existing_rows = len(self._images)
          logger.trace("existing_rows: %s. required_rows: %s", existing_rows, required_rows)
 
</s> remove         """ :class:`numpy.ndarray`: The currently visible :class:`~lib.faces_detect.DetectedFace`
 </s> add         """ :class:`numpy.ndarray`: The currently visible :class:`~lib.align.DetectedFace` </s> remove     def remove_faces(self):
        """ Process to remove faces from an alignments file """
        face_hashes = list(self.faces.items.keys())
 </s> add     def _remove_faces(self):
        """ Removes faces from the alignments file if a faces folder has been provided and the
        faces do not exist within each alignments file. """
        face_hashes = list(self._faces.items.keys()) </s> remove         :class:`~lib.faces_detect.DetectedFace`. objects and add to :attr:`_frame_faces`. """
 </s> add         :class:`~lib.align.DetectedFace`. objects and add to :attr:`_frame_faces`. """ </s> remove         self.alignments = alignments
        self.faces = faces if faces else Faces(arguments.faces_dir)
 </s> add         self._alignments = alignments
        self._faces = faces if faces else Faces(arguments.faces_dir) </s> remove             self.set_destination_filename()
            self.final_alignments.save()
 </s> add             self._set_destination_filename()
            self._final_alignments.save()
        if (isinstance(self._images, np.ndarray) and isinstance(self._visible_grid, np.ndarray)
                and self._visible_grid.shape[-1] != self._images.shape[-1]):
  
      def update(self):
          """ Load and unload thumbnails in the visible area of the faces viewer. """
          self._visible_grid, self._visible_faces = self._grid.visible_area
        if (isinstance(self._images, np.ndarray) and isinstance(self._visible_grid, np.ndarray)
                and self._visible_grid.shape[-1] != self._images.shape[-1]):
        if (isinstance(self._images, np.ndarray) and isinstance(self._visible_grid, np.ndarray)
                and self._visible_grid.shape[-1] != self._images.shape[-1]):
              self._recycle_objects()
  
          required_rows = self._visible_grid.shape[1] if self._grid.is_valid else 0
          existing_rows = len(self._images)
          logger.trace("existing_rows: %s. required_rows: %s", existing_rows, required_rows)
keep keep keep keep replace replace keep keep keep keep keep
 Extract - Increase area and move centering (#1095)

* Extract
  - Implement aligner re-feeding
  - Add extract type to pipeline.ExtractMedia
  - Add pose annotation to debug
* Convert
  - implement centering
  - remove usage of feed and reference face properties
  - Remove distributed option from convert
  - Force update of alignments file on legacy receive
* Train
  - Resize preview image to model output size
  - Force legacy centering if centering does not exist in model's state file
  - Enable training on legacy face sets

* Alignments Tool
  - Update draw to include head/pose
  - Remove DFL drop + linting
  - Remove remove-frames job
  - remove align-eyes option
  - Update legacy masks to new extract type
  - Exit if attempting to merge version 1.0 alignments files with version 2.0 alignments files
  - Re-generate thumbnails on legacy upgrade
* Mask Tool
  - Update for new extract + bugfix full frame
* Manual Tool
  - Update to new extraction method
   - Disable legacy alignments,
   - extract box bugfix
   - extract faces - size to 512 and center on head
* Preview Tool
  - Display based on model centering
* Sort Tool
  - Use alignments for sort by face

* lib.aligner
  - Add Pose Class
  - Add AlignedFace Class
  - center _MEAN_FACE on x
  - Add meta information with versioning to alignments file
  - lib.aligner.get_align_matrix to use landmarks not face
  - Refactor aligned faces in lib.faces_detect
* lib.logger
  - larger file log padding
* lib.config
  - Fix global changeable_items
* lib.face_filter
  - Use new extracted face images
* lib.image
  - bump thumbnail default size to 96px 
tools/manual/faceviewer/viewport.py