Pillow/docs/reference/ImageStat.rst

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2013-10-14 08:57:07 +04:00
.. py:module:: PIL.ImageStat
.. py:currentmodule:: PIL.ImageStat
:py:mod:`ImageStat` Module
==========================
The :py:mod:`ImageStat` module calculates global statistics for an image, or
for a region of an image.
.. py:class:: PIL.ImageStat.Stat(image_or_list, mask=None)
Calculate statistics for the given image. If a mask is included,
only the regions covered by that mask are included in the
statistics. You can also pass in a previously calculated histogram.
:param image: A PIL image, or a precalculated histogram.
:param mask: An optional mask.
.. py:attribute:: extrema
Min/max values for each band in the image.
.. py:attribute:: count
Total number of pixels.
.. py:attribute:: sum
Sum of all pixels.
.. py:attribute:: sum2
Squared sum of all pixels.
.. py:attribute:: pixel
Average pixel level.
.. py:attribute:: median
Median pixel level.
.. py:attribute:: rms
RMS (root-mean-square).
.. py:attribute:: var
Variance.
.. py:attribute:: stddev
Standard deviation.