python-pillow/Pillow
1
1
Fork 0
mirror of https://github.com/python-pillow/Pillow.git synced 2024-12-26 01:46:18 +03:00
Code Issues Packages Projects Releases Wiki Activity

Document mct and no_jp2 options for saving JPEG 2000

Browse Source
This commit is contained in:
Hugo van Kemenade 2022-03-31 22:19:00 +03:00
parent 698f52916e
commit e0de5b67ce
2 changed files with 21 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
docs/handbook/image-file-formats.rst
View File

@ -513,6 +513,8 @@ The :py:meth:`~PIL.Image.Image.save` method supports the following options:
Reversible Color Transformation. MCT works best with a ``mode`` of
``RGB`` and is only applicable when the image data has 3 components.
.. versionadded:: 9.1.0
**progression**
Controls the progression order; must be one of ``"LRCP"``, ``"RLCP"``,
``"RPCL"``, ``"PCRL"``, ``"CPRL"``. The letters stand for Component,
@ -536,6 +538,8 @@ The :py:meth:`~PIL.Image.Image.save` method supports the following options:
saving, otherwise the extension of the filename will be used to determine
the format (default).
.. versionadded:: 9.1.0
.. note::
To enable JPEG 2000 support, you need to build and install the OpenJPEG

22
docs/releasenotes/9.1.0.rst
View File

@ -146,12 +146,24 @@ At present, the information within each block is merely returned as a dictionary
"data" entry. This will allow more useful information to be added in the future without
breaking backwards compatibility.
Added rawmode argument to Image.getpalette()
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Added mct and no_jp2 options for saving JPEG 2000
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
By default, :py:meth:`~PIL.Image.Image.getpalette` returns RGB data from the palette.
A ``rawmode`` argument has been added, to allow the mode to be chosen instead. ``None``
can be used to return data in the current mode of the palette.
The :py:meth:`PIL.Image.Image.save` method now supports the following options for
JPEG 2000:
**mct**
If ``1`` then enable multiple component transformation when encoding,
otherwise use ``0`` for no component transformation (default). If MCT is
enabled and ``irreversible`` is ``True`` then the Irreversible Color
Transformation will be applied, otherwise encoding will use the
Reversible Color Transformation. MCT works best with a ``mode`` of
``RGB`` and is only applicable when the image data has 3 components.
**no_jp2**
If ``True`` then don't wrap the raw codestream in the JP2 file format when
saving, otherwise the extension of the filename will be used to determine
the format (default).
Added PyEncoder
^^^^^^^^^^^^^^^