The ImageStat module calculates global statistics for an image, or for a region of an image.
Functions #
Stat #
ImageStat.Stat(image) ⇒ Stat instance
ImageStat.Stat(image, mask) ⇒ Stat instance
Calculates statistics for the give image. If a mask is included, only the regions covered by that mask are included in the statistics.
ImageStat.Stat(list) ⇒ Stat instance
Same as above, but calculates statistics for a previously calculated histogram.
Attributes #
The following attributes contain a sequence with one element for each layer in the image. All attributes are lazily evaluated; if you don’t need a value, it won’t be calculated.
extrema #
stat.extrema
(Attribute). Get min/max values for each band in the image.
count #
stat.count
(Attribute). Get total number of pixels.
sum #
stat.sum
(Attribute). Get sum of all pixels.
sum2 #
stat.sum2
(Attribute). Squared sum of all pixels.
pixel #
stat.mean
(Attribute). Average pixel level.
median #
stat.median
(Attribute). Median pixel level.
rms #
stat.rms
(Attribute). RMS (root-mean-square).
var #
stat.var
(Attribute). Variance.
stddev #
stat.stddev
(Attribute). Standard deviation.
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