Document that histogram() uses 256 bins per channel #6106
Merged
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Resolves #3958
im.histogram()
groups pixel counts into 256 bins per channel, even forI
andF
mode images (which have pixel values of 0 to 65535, meaning that you could have 65536 bins in theory).The ImageStat module performs operations on that histogram. This means that for
I
andF
mode images, ImageStat can only report what it has been given.So I've added a note that
mean
,median
,rms
and the maximumextrema
can't be more than 255.