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Merge pull request #6067 from radarhere/subsampling

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Corrected JPEG subsampling documentation
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Hugo van Kemenade 2022-02-19 10:57:41 +02:00 committed by GitHub
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docs/handbook/image-file-formats.rst
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@ -381,11 +381,12 @@ The :py:meth:`~PIL.Image.Image.save` method supports the following options:
* ``keep``: Only valid for JPEG files, will retain the original image setting. * ``keep``: Only valid for JPEG files, will retain the original image setting.
* ``4:4:4``, ``4:2:2``, ``4:2:0``: Specific sampling values * ``4:4:4``, ``4:2:2``, ``4:2:0``: Specific sampling values
* ``-1``: equivalent to ``keep``
* ``0``: equivalent to ``4:4:4`` * ``0``: equivalent to ``4:4:4``
* ``1``: equivalent to ``4:2:2`` * ``1``: equivalent to ``4:2:2``
* ``2``: equivalent to ``4:2:0`` * ``2``: equivalent to ``4:2:0``
If absent, the setting will be determined by libjpeg or libjpeg-turbo.
**qtables** **qtables**
If present, sets the qtables for the encoder. This is listed as an If present, sets the qtables for the encoder. This is listed as an
advanced option for wizards in the JPEG documentation. Use with advanced option for wizards in the JPEG documentation. Use with