mirror of
https://github.com/python-pillow/Pillow.git
synced 2024-09-21 11:28:58 +03:00
386 lines
13 KiB
ReStructuredText
386 lines
13 KiB
ReStructuredText
.. py:module:: PIL.ImageCms
|
|
.. py:currentmodule:: PIL.ImageCms
|
|
|
|
:py:mod:`~PIL.ImageCms` Module
|
|
==============================
|
|
|
|
The :py:mod:`~PIL.ImageCms` module provides color profile management
|
|
support using the LittleCMS2 color management engine, based on Kevin
|
|
Cazabon's PyCMS library.
|
|
|
|
.. autoclass:: ImageCmsProfile
|
|
:members:
|
|
:special-members: __init__
|
|
.. autoclass:: ImageCmsTransform
|
|
:members:
|
|
:undoc-members:
|
|
.. autoexception:: PyCMSError
|
|
|
|
Constants
|
|
---------
|
|
|
|
.. autoclass:: Intent
|
|
:members:
|
|
:member-order: bysource
|
|
:undoc-members:
|
|
.. autoclass:: Direction
|
|
:members:
|
|
:member-order: bysource
|
|
:undoc-members:
|
|
.. autoclass:: Flags
|
|
:members:
|
|
:member-order: bysource
|
|
:undoc-members:
|
|
|
|
Functions
|
|
---------
|
|
|
|
.. autofunction:: applyTransform
|
|
.. autofunction:: buildProofTransform
|
|
.. autofunction:: buildProofTransformFromOpenProfiles
|
|
.. autofunction:: buildTransform
|
|
.. autofunction:: buildTransformFromOpenProfiles
|
|
.. autofunction:: createProfile
|
|
.. autofunction:: getDefaultIntent
|
|
.. autofunction:: getOpenProfile
|
|
.. autofunction:: getProfileCopyright
|
|
.. autofunction:: getProfileDescription
|
|
.. autofunction:: getProfileInfo
|
|
.. autofunction:: getProfileManufacturer
|
|
.. autofunction:: getProfileModel
|
|
.. autofunction:: getProfileName
|
|
.. autofunction:: get_display_profile
|
|
.. autofunction:: isIntentSupported
|
|
.. autofunction:: profileToProfile
|
|
.. autofunction:: versions
|
|
|
|
CmsProfile
|
|
----------
|
|
|
|
The ICC color profiles are wrapped in an instance of the class
|
|
:py:class:`~core.CmsProfile`. The specification ICC.1:2010 contains more
|
|
information about the meaning of the values in ICC profiles.
|
|
|
|
For convenience, all XYZ-values are also given as xyY-values (so they
|
|
can be easily displayed in a chromaticity diagram, for example).
|
|
|
|
.. py:currentmodule:: PIL.ImageCms.core
|
|
.. py:class:: CmsProfile
|
|
:canonical: PIL._imagingcms.CmsProfile
|
|
|
|
.. py:attribute:: creation_date
|
|
:type: Optional[datetime.datetime]
|
|
|
|
Date and time this profile was first created (see 7.2.1 of ICC.1:2010).
|
|
|
|
.. py:attribute:: version
|
|
:type: float
|
|
|
|
The version number of the ICC standard that this profile follows
|
|
(e.g. ``2.0``).
|
|
|
|
.. py:attribute:: icc_version
|
|
:type: int
|
|
|
|
Same as ``version``, but in encoded format (see 7.2.4 of ICC.1:2010).
|
|
|
|
.. py:attribute:: device_class
|
|
:type: str
|
|
|
|
4-character string identifying the profile class. One of
|
|
``scnr``, ``mntr``, ``prtr``, ``link``, ``spac``, ``abst``,
|
|
``nmcl`` (see 7.2.5 of ICC.1:2010 for details).
|
|
|
|
.. py:attribute:: xcolor_space
|
|
:type: str
|
|
|
|
4-character string (padded with whitespace) identifying the color
|
|
space, e.g. ``XYZ␣``, ``RGB␣`` or ``CMYK`` (see 7.2.6 of
|
|
ICC.1:2010 for details).
|
|
|
|
.. py:attribute:: connection_space
|
|
:type: str
|
|
|
|
4-character string (padded with whitespace) identifying the color
|
|
space on the B-side of the transform (see 7.2.7 of ICC.1:2010 for
|
|
details).
|
|
|
|
.. py:attribute:: header_flags
|
|
:type: int
|
|
|
|
The encoded header flags of the profile (see 7.2.11 of ICC.1:2010
|
|
for details).
|
|
|
|
.. py:attribute:: header_manufacturer
|
|
:type: str
|
|
|
|
4-character string (padded with whitespace) identifying the device
|
|
manufacturer, which shall match the signature contained in the
|
|
appropriate section of the ICC signature registry found at
|
|
www.color.org (see 7.2.12 of ICC.1:2010).
|
|
|
|
.. py:attribute:: header_model
|
|
:type: str
|
|
|
|
4-character string (padded with whitespace) identifying the device
|
|
model, which shall match the signature contained in the
|
|
appropriate section of the ICC signature registry found at
|
|
www.color.org (see 7.2.13 of ICC.1:2010).
|
|
|
|
.. py:attribute:: attributes
|
|
:type: int
|
|
|
|
Flags used to identify attributes unique to the particular device
|
|
setup for which the profile is applicable (see 7.2.14 of
|
|
ICC.1:2010 for details).
|
|
|
|
.. py:attribute:: rendering_intent
|
|
:type: int
|
|
|
|
The rendering intent to use when combining this profile with
|
|
another profile (usually overridden at run-time, but provided here
|
|
for DeviceLink and embedded source profiles, see 7.2.15 of ICC.1:2010).
|
|
|
|
One of ``ImageCms.Intent.ABSOLUTE_COLORIMETRIC``, ``ImageCms.Intent.PERCEPTUAL``,
|
|
``ImageCms.Intent.RELATIVE_COLORIMETRIC`` and ``ImageCms.Intent.SATURATION``.
|
|
|
|
.. py:attribute:: profile_id
|
|
:type: bytes
|
|
|
|
A sequence of 16 bytes identifying the profile (via a specially
|
|
constructed MD5 sum), or 16 binary zeroes if the profile ID has
|
|
not been calculated (see 7.2.18 of ICC.1:2010).
|
|
|
|
.. py:attribute:: copyright
|
|
:type: Optional[str]
|
|
|
|
The text copyright information for the profile (see 9.2.21 of ICC.1:2010).
|
|
|
|
.. py:attribute:: manufacturer
|
|
:type: Optional[str]
|
|
|
|
The (English) display string for the device manufacturer (see
|
|
9.2.22 of ICC.1:2010).
|
|
|
|
.. py:attribute:: model
|
|
:type: Optional[str]
|
|
|
|
The (English) display string for the device model of the device
|
|
for which this profile is created (see 9.2.23 of ICC.1:2010).
|
|
|
|
.. py:attribute:: profile_description
|
|
:type: Optional[str]
|
|
|
|
The (English) display string for the profile description (see
|
|
9.2.41 of ICC.1:2010).
|
|
|
|
.. py:attribute:: target
|
|
:type: Optional[str]
|
|
|
|
The name of the registered characterization data set, or the
|
|
measurement data for a characterization target (see 9.2.14 of
|
|
ICC.1:2010).
|
|
|
|
.. py:attribute:: red_colorant
|
|
:type: Optional[tuple[tuple[float]]]
|
|
|
|
The first column in the matrix used in matrix/TRC transforms (see 9.2.44 of ICC.1:2010).
|
|
|
|
The value is in the format ``((X, Y, Z), (x, y, Y))``, if available.
|
|
|
|
.. py:attribute:: green_colorant
|
|
:type: Optional[tuple[tuple[float]]]
|
|
|
|
The second column in the matrix used in matrix/TRC transforms (see 9.2.30 of ICC.1:2010).
|
|
|
|
The value is in the format ``((X, Y, Z), (x, y, Y))``, if available.
|
|
|
|
.. py:attribute:: blue_colorant
|
|
:type: Optional[tuple[tuple[float]]]
|
|
|
|
The third column in the matrix used in matrix/TRC transforms (see 9.2.4 of ICC.1:2010).
|
|
|
|
The value is in the format ``((X, Y, Z), (x, y, Y))``, if available.
|
|
|
|
.. py:attribute:: luminance
|
|
:type: Optional[tuple[tuple[float]]]
|
|
|
|
The absolute luminance of emissive devices in candelas per square
|
|
metre as described by the Y channel (see 9.2.32 of ICC.1:2010).
|
|
|
|
The value is in the format ``((X, Y, Z), (x, y, Y))``, if available.
|
|
|
|
.. py:attribute:: chromaticity
|
|
:type: Optional[tuple[tuple[float]]]
|
|
|
|
The data of the phosphor/colorant chromaticity set used (red,
|
|
green and blue channels, see 9.2.16 of ICC.1:2010).
|
|
|
|
The value is in the format ``((x, y, Y), (x, y, Y), (x, y, Y))``, if available.
|
|
|
|
.. py:attribute:: chromatic_adaption
|
|
:type: tuple[tuple[float]]
|
|
|
|
The chromatic adaption matrix converts a color measured using the
|
|
actual illumination conditions and relative to the actual adopted
|
|
white, to a color relative to the PCS adopted white, with
|
|
complete adaptation from the actual adopted white chromaticity to
|
|
the PCS adopted white chromaticity (see 9.2.15 of ICC.1:2010).
|
|
|
|
Two 3-tuples of floats are returned in a 2-tuple,
|
|
one in (X, Y, Z) space and one in (x, y, Y) space.
|
|
|
|
.. py:attribute:: colorant_table
|
|
:type: list[str]
|
|
|
|
This tag identifies the colorants used in the profile by a unique
|
|
name and set of PCSXYZ or PCSLAB values (see 9.2.19 of
|
|
ICC.1:2010).
|
|
|
|
.. py:attribute:: colorant_table_out
|
|
:type: list[str]
|
|
|
|
This tag identifies the colorants used in the profile by a unique
|
|
name and set of PCSLAB values (for DeviceLink profiles only, see
|
|
9.2.19 of ICC.1:2010).
|
|
|
|
.. py:attribute:: colorimetric_intent
|
|
:type: Optional[str]
|
|
|
|
4-character string (padded with whitespace) identifying the image
|
|
state of PCS colorimetry produced using the colorimetric intent
|
|
transforms (see 9.2.20 of ICC.1:2010 for details).
|
|
|
|
.. py:attribute:: perceptual_rendering_intent_gamut
|
|
:type: Optional[str]
|
|
|
|
4-character string (padded with whitespace) identifying the (one)
|
|
standard reference medium gamut (see 9.2.37 of ICC.1:2010 for
|
|
details).
|
|
|
|
.. py:attribute:: saturation_rendering_intent_gamut
|
|
:type: Optional[str]
|
|
|
|
4-character string (padded with whitespace) identifying the (one)
|
|
standard reference medium gamut (see 9.2.37 of ICC.1:2010 for
|
|
details).
|
|
|
|
.. py:attribute:: technology
|
|
:type: Optional[str]
|
|
|
|
4-character string (padded with whitespace) identifying the device
|
|
technology (see 9.2.47 of ICC.1:2010 for details).
|
|
|
|
.. py:attribute:: media_black_point
|
|
:type: Optional[tuple[tuple[float]]]
|
|
|
|
This tag specifies the media black point and is used for
|
|
generating absolute colorimetry.
|
|
|
|
This tag was available in ICC 3.2, but it is removed from
|
|
version 4.
|
|
|
|
The value is in the format ``((X, Y, Z), (x, y, Y))``, if available.
|
|
|
|
.. py:attribute:: media_white_point_temperature
|
|
:type: Optional[float]
|
|
|
|
Calculates the white point temperature (see the LCMS documentation
|
|
for more information).
|
|
|
|
.. py:attribute:: viewing_condition
|
|
:type: Optional[str]
|
|
|
|
The (English) display string for the viewing conditions (see
|
|
9.2.48 of ICC.1:2010).
|
|
|
|
.. py:attribute:: screening_description
|
|
:type: Optional[str]
|
|
|
|
The (English) display string for the screening conditions.
|
|
|
|
This tag was available in ICC 3.2, but it is removed from
|
|
version 4.
|
|
|
|
.. py:attribute:: red_primary
|
|
:type: Optional[tuple[tuple[float]]]
|
|
|
|
The XYZ-transformed of the RGB primary color red (1, 0, 0).
|
|
|
|
The value is in the format ``((X, Y, Z), (x, y, Y))``, if available.
|
|
|
|
.. py:attribute:: green_primary
|
|
:type: Optional[tuple[tuple[float]]]
|
|
|
|
The XYZ-transformed of the RGB primary color green (0, 1, 0).
|
|
|
|
The value is in the format ``((X, Y, Z), (x, y, Y))``, if available.
|
|
|
|
.. py:attribute:: blue_primary
|
|
:type: Optional[tuple[tuple[float]]]
|
|
|
|
The XYZ-transformed of the RGB primary color blue (0, 0, 1).
|
|
|
|
The value is in the format ``((X, Y, Z), (x, y, Y))``, if available.
|
|
|
|
.. py:attribute:: is_matrix_shaper
|
|
:type: bool
|
|
|
|
True if this profile is implemented as a matrix shaper (see
|
|
documentation on LCMS).
|
|
|
|
.. py:attribute:: clut
|
|
:type: dict[tuple[bool]]
|
|
|
|
Returns a dictionary of all supported intents and directions for
|
|
the CLUT model.
|
|
|
|
The dictionary is indexed by intents
|
|
(``ImageCms.Intent.ABSOLUTE_COLORIMETRIC``,
|
|
``ImageCms.Intent.PERCEPTUAL``,
|
|
``ImageCms.Intent.RELATIVE_COLORIMETRIC`` and
|
|
``ImageCms.Intent.SATURATION``).
|
|
|
|
The values are 3-tuples indexed by directions
|
|
(``ImageCms.Direction.INPUT``, ``ImageCms.Direction.OUTPUT``,
|
|
``ImageCms.Direction.PROOF``).
|
|
|
|
The elements of the tuple are booleans. If the value is ``True``,
|
|
that intent is supported for that direction.
|
|
|
|
.. py:attribute:: intent_supported
|
|
:type: dict[tuple[bool]]
|
|
|
|
Returns a dictionary of all supported intents and directions.
|
|
|
|
The dictionary is indexed by intents
|
|
(``ImageCms.Intent.ABSOLUTE_COLORIMETRIC``,
|
|
``ImageCms.Intent.PERCEPTUAL``,
|
|
``ImageCms.Intent.RELATIVE_COLORIMETRIC`` and
|
|
``ImageCms.Intent.SATURATION``).
|
|
|
|
The values are 3-tuples indexed by directions
|
|
(``ImageCms.Direction.INPUT``, ``ImageCms.Direction.OUTPUT``,
|
|
``ImageCms.Direction.PROOF``).
|
|
|
|
The elements of the tuple are booleans. If the value is ``True``,
|
|
that intent is supported for that direction.
|
|
|
|
There is one function defined on the class:
|
|
|
|
.. py:method:: is_intent_supported(intent, direction)
|
|
|
|
Returns if the intent is supported for the given direction.
|
|
|
|
Note that you can also get this information for all intents and directions
|
|
with :py:attr:`.intent_supported`.
|
|
|
|
:param intent: One of ``ImageCms.Intent.ABSOLUTE_COLORIMETRIC``,
|
|
``ImageCms.Intent.PERCEPTUAL``,
|
|
``ImageCms.Intent.RELATIVE_COLORIMETRIC``
|
|
and ``ImageCms.Intent.SATURATION``.
|
|
:param direction: One of ``ImageCms.Direction.INPUT``,
|
|
``ImageCms.Direction.OUTPUT``
|
|
and ``ImageCms.Direction.PROOF``
|
|
:return: Boolean if the intent and direction is supported.
|