mirror of
https://github.com/python-pillow/Pillow.git
synced 2025-11-01 00:17:27 +03:00
75 lines
2.3 KiB
ReStructuredText
75 lines
2.3 KiB
ReStructuredText
.. py:module:: PIL.ImageEnhance
|
|
.. py:currentmodule:: PIL.ImageEnhance
|
|
|
|
:py:mod:`ImageEnhance` Module
|
|
=============================
|
|
|
|
The :py:mod:`ImageEnhance` module contains a number of classes that can be used
|
|
for image enhancement.
|
|
|
|
Example: Vary the sharpness of an image
|
|
---------------------------------------
|
|
|
|
.. code-block:: python
|
|
|
|
from PIL import ImageEnhance
|
|
|
|
enhancer = ImageEnhance.Sharpness(image)
|
|
|
|
for i in range(8):
|
|
factor = i / 4.0
|
|
enhancer.enhance(factor).show("Sharpness %f" % factor)
|
|
|
|
Also see the :file:`enhancer.py` demo program in the :file:`Scripts/`
|
|
directory.
|
|
|
|
Classes
|
|
-------
|
|
|
|
All enhancement classes implement a common interface, containing a single
|
|
method:
|
|
|
|
.. py:class:: PIL.ImageEnhance._Enhance
|
|
.. py:method:: enhance(factor)
|
|
|
|
Returns an enhanced image.
|
|
|
|
:param factor: A floating point value controlling the enhancement.
|
|
Factor 1.0 always returns a copy of the original image,
|
|
lower factors mean less color (brightness, contrast,
|
|
etc), and higher values more. There are no restrictions
|
|
on this value.
|
|
|
|
.. py:class:: PIL.ImageEnhance.Color(image)
|
|
|
|
Adjust image color balance.
|
|
|
|
This class can be used to adjust the colour balance of an image, in
|
|
a manner similar to the controls on a colour TV set. An enhancement
|
|
factor of 0.0 gives a black and white image. A factor of 1.0 gives
|
|
the original image.
|
|
|
|
.. py:class:: PIL.ImageEnhance.Contrast(image)
|
|
|
|
Adjust image contrast.
|
|
|
|
This class can be used to control the contrast of an image, similar
|
|
to the contrast control on a TV set. An enhancement factor of 0.0
|
|
gives a solid grey image. A factor of 1.0 gives the original image.
|
|
|
|
.. py:class:: PIL.ImageEnhance.Brightness(image)
|
|
|
|
Adjust image brightness.
|
|
|
|
This class can be used to control the brightness of an image. An
|
|
enhancement factor of 0.0 gives a black image. A factor of 1.0 gives the
|
|
original image.
|
|
|
|
.. py:class:: PIL.ImageEnhance.Sharpness(image)
|
|
|
|
Adjust image sharpness.
|
|
|
|
This class can be used to adjust the sharpness of an image. An
|
|
enhancement factor of 0.0 gives a blurred image, a factor of 1.0 gives the
|
|
original image, and a factor of 2.0 gives a sharpened image.
|