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Image channel is used when converting PA with an RGBA palette

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Andrew Murray 2022-10-13 20:21:39 +11:00
parent 44510d2931
commit a4b257269e
1 changed files with 4 additions and 1 deletions
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src/PIL/Image.py
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@ -880,7 +880,7 @@ class Image:
and the palette can be represented without a palette.
The current version supports all possible conversions between
"L", "RGB" and "CMYK." The ``matrix`` argument only supports "L"
"L", "RGB" and "CMYK". The ``matrix`` argument only supports "L"
and "RGB".
When translating a color image to greyscale (mode "L"),
@ -899,6 +899,9 @@ class Image:
this passes the operation to :py:meth:`~PIL.Image.Image.quantize`,
and ``dither`` and ``palette`` are ignored.
When converting from "PA", if an "RGBA" palette is present, the alpha
channel from the image will be used instead of the values from the palette.
:param mode: The requested mode. See: :ref:`concept-modes`.
:param matrix: An optional conversion matrix. If given, this
should be 4- or 12-tuple containing floating point values.