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Python Imaging Library (Fork)
7b815a5f1d
This calculates the entropy for the image, based on the histogram. Because this uses image histogram data directly, the existing C function underpinning the `image.histogram()` method was abstracted into a static function to parse extrema tuple arguments, and a new C function was added to calculate image entropy, making use of the new static extrema function. The extrema-parsing function was written by @homm, based on the macro abstraction I wrote, during the discussion of my first entropy-method pull request: https://git.io/fhodS The new `image.entropy()` method is based on `image.histogram()`, and will accept the same arguments to calculate the histogram data it will use to assess the entropy of the image. The algorithm and methodology is based on existing Python code: * https://git.io/fhmIU ... A test case in the `Tests/` directory, and doctest lines in `selftest.py`, have both been added and checked. Changes proposed in this pull request: * Added “math.h” include to _imaging.c * The addition of an `image.entropy()` method to the `Image` Python class, * The abstraction of the extrema-parsing logic of of the C function `_histogram` into a static function, and * The use of that static function in both the `_histogram` and `_entropy` C functions. * Minor documentation addenda in the docstrings for both the `image.entropy()` and `image.histogram()` methods were also added. * Removed outdated boilerplate from testing code * Removed unused “unittest” import |
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| mp_compile.py | ||
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| requirements.txt | ||
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Pillow
======
Python Imaging Library (Fork)
-----------------------------
Pillow is the friendly PIL fork by `Alex Clark and Contributors <https://github.com/python-pillow/Pillow/graphs/contributors>`_. PIL is the Python Imaging Library by Fredrik Lundh and Contributors. As of 2019, Pillow development is `supported by Tidelift <https://tidelift.com/subscription/pkg/pypi-pillow>`_.
.. start-badges
.. list-table::
:stub-columns: 1
* - docs
- |docs|
* - tests
- |linux| |macos| |windows| |coverage|
* - package
- |zenodo| |tidelift| |version| |downloads|
* - social
- |gitter| |twitter|
.. end-badges
More Information
----------------
- `Documentation <https://pillow.readthedocs.io/>`_
- `Installation <https://pillow.readthedocs.io/en/latest/installation.html>`_
- `Handbook <https://pillow.readthedocs.io/en/latest/handbook/index.html>`_
- `Contribute <https://github.com/python-pillow/Pillow/blob/master/.github/CONTRIBUTING.md>`_
- `Issues <https://github.com/python-pillow/Pillow/issues>`_
- `Pull requests <https://github.com/python-pillow/Pillow/pulls>`_
- `Changelog <https://github.com/python-pillow/Pillow/blob/master/CHANGES.rst>`_
- `Pre-fork <https://github.com/python-pillow/Pillow/blob/master/CHANGES.rst#pre-fork>`_
Report a Vulnerability
----------------------
To report a security vulnerability, please follow the procedure described in the `Tidelift security policy <https://tidelift.com/docs/security>`_.
.. |docs| image:: https://readthedocs.org/projects/pillow/badge/?version=latest
:target: https://pillow.readthedocs.io/?badge=latest
:alt: Documentation Status
.. |linux| image:: https://img.shields.io/travis/python-pillow/Pillow/master.svg?label=Linux%20build
:target: https://travis-ci.org/python-pillow/Pillow
:alt: Travis CI build status (Linux)
.. |macos| image:: https://img.shields.io/travis/python-pillow/pillow-wheels/master.svg?label=macOS%20build
:target: https://travis-ci.org/python-pillow/pillow-wheels
:alt: Travis CI build status (macOS)
.. |windows| image:: https://img.shields.io/appveyor/ci/python-pillow/Pillow/master.svg?label=Windows%20build
:target: https://ci.appveyor.com/project/python-pillow/Pillow
:alt: AppVeyor CI build status (Windows)
.. |coverage| image:: https://codecov.io/gh/python-pillow/Pillow/branch/master/graph/badge.svg
:target: https://codecov.io/gh/python-pillow/Pillow
:alt: Code coverage
.. |zenodo| image:: https://zenodo.org/badge/17549/python-pillow/Pillow.svg
:target: https://zenodo.org/badge/latestdoi/17549/python-pillow/Pillow
.. |tidelift| image:: https://tidelift.com/badges/github/python-pillow/Pillow?style=flat
:target: https://tidelift.com/subscription/pkg/pypi-pillow?utm_source=pypi-pillow&utm_medium=referral&utm_campaign=readme
.. |version| image:: https://img.shields.io/pypi/v/pillow.svg
:target: https://pypi.org/project/Pillow/
:alt: Latest PyPI version
.. |downloads| image:: https://img.shields.io/pypi/dm/pillow.svg
:target: https://pypi.org/project/Pillow/
:alt: Number of PyPI downloads
.. |gitter| image:: https://badges.gitter.im/python-pillow/Pillow.svg
:target: https://gitter.im/python-pillow/Pillow?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge
:alt: Join the chat at https://gitter.im/python-pillow/Pillow
.. |twitter| image:: https://img.shields.io/badge/tweet-on%20Twitter-00aced.svg
:target: https://twitter.com/PythonPillow
:alt: Follow on https://twitter.com/PythonPillow