:orphan:
.. _GRIB-PIL:
GRIB-PIL GRIB
=============
Extensions: ``.grib``
*From the Pillow docs:*
.. versionadded:: Pillow 1.1.5
PIL provides a stub driver for GRIB files.
The driver requires the file to start with a GRIB header. If you have files
with embedded GRIB data, or files with multiple GRIB fields, your application
has to seek to the header before passing the file handle to PIL.
To add read or write support to your application, use
:py:func:`PIL.GribStubImagePlugin.register_handler`.
Parameters for reading
----------------------
pilmode : str
From the Pillow documentation:
* 'L' (8-bit pixels, grayscale)
* 'P' (8-bit pixels, mapped to any other mode using a color palette)
* 'RGB' (3x8-bit pixels, true color)
* 'RGBA' (4x8-bit pixels, true color with transparency mask)
* 'CMYK' (4x8-bit pixels, color separation)
* 'YCbCr' (3x8-bit pixels, color video format)
* 'I' (32-bit signed integer pixels)
* 'F' (32-bit floating point pixels)
PIL also provides limited support for a few special modes, including
'LA' ('L' with alpha), 'RGBX' (true color with padding) and 'RGBa'
(true color with premultiplied alpha).
When translating a color image to grayscale (mode 'L', 'I' or 'F'),
the library uses the ITU-R 601-2 luma transform::
L = R * 299/1000 + G * 587/1000 + B * 114/1000
as_gray : bool
If True, the image is converted using mode 'F'. When `mode` is
not None and `as_gray` is True, the image is first converted
according to `mode`, and the result is then "flattened" using
mode 'F'.
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