ImageStat Module

The ImageStat module calculates global statistics for an image, or for a region of an image.

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.

参数:	image – A PIL image, or a precalculated histogram. mask – An optional mask.

extrema¶

Min/max values for each band in the image.

count¶

Total number of pixels.

sum¶

Sum of all pixels.

sum2¶

Squared sum of all pixels.

pixel¶

Average pixel level.

median¶

Median pixel level.

rms¶

RMS (root-mean-square).

var¶

Variance.

stddev¶

Standard deviation.