          A compatible `cv2` image file extension that the final image is to be saved to.
  
      Returns
      -------
      image_hash: str
          The :func:`hashlib.hexdigest()` representation of the `sha1` hash of the encoded image
      encoded_image: bytes
          The image encoded into the correct file format
  
      Example
      -------
 
</s> remove         Full path to the image to be loaded.
    output_shape: bool
        If ``True`` then a tuple is returned with the shape tuple of the image as the final value.
        Default: ``False``
 </s> add         Full path to the image to be retrieve the meta information for. </s> remove     str
        The :func:`hashlib.hexdigest()` representation of the `sha1` hash of the given image.
 </s> add     dict
        The output dictionary will contain the `width` and `height` of the png image as well as any
        `itxt` information. </s> remove         If :class:`FacesLoader` is in use then the sha1 hash of the image is added as the final
        item in the output `tuple`.
 </s> add         If :class:`FacesLoader` is in use then the Faceswap metadata of the image stored in the
        image exif file is added as the final item in the output `tuple`. </s> remove     output_shape: bool
        If ``True`` then a 3rd item is added to the output tuple containing the shape of the read
        image. Default: ``False``
 </s> add 
          A compatible `cv2` image file extension that the final image is to be saved to.
  
      Returns
      -------


      encoded_image: bytes
          The image encoded into the correct file format
  
      Example
      -------
keep keep keep keep replace replace keep keep keep keep keep
 Update extracted faces to use PNG EXIF data (#1123)

Documentation
  - Update Usage.md, align.rst and image.rst
lib.image.py
  - read_image - Remove hash return, add metadata return
  - Remove read_image_hash functions
  - Add read_image_meta functios
  - Replace encode_image_with_hash with encode_image (to store metadata)
  - Add png meta reading and writing functions
  - Update Image Loaders/Savers to handle metadata rather than hashes
lib.training_data
  - Naming updates to remove references to hashes
lib.align.Alignments
  - Add versioning notes
  - Increment alignments version to 2.1
  - Deprecate hashing lookup functions
  - Replace filter_hashes with filter_faces
lib.align.detected_face
  - DetectedFace
    - Remove hash property
    - Add png header data serializing/deserializing functions
  - Mask
    - Add png header data serializing/deserializing functions
  - add update_legacy_png_header function to update png meta data
lib.cli.args - Deprecate alignments files for training
- plugins.train.trainer
  - Update alignments/mask code to read png header data
- scripts.convert
  - Aligned images folder - read data from png headers
- scripts.extract
  - Write png header information and no longer store hash of face
- tools.alignments
  - remove leftover-faces, merge and update-hashes jobs
  - Update jobs to use png meta data rather than hashes
- tools.manual
  - Update extract code to output png meta data and don't store hashes
  - Perform check on launch that tool is not pointing at a faces folder
tools.mask
  - Update to use png meta data
tools.sort
  - Update to use png meta data 
lib/image.py