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Creates a dictionary of Histogram Error Ring Statistic (HERS) descriptor arrays from square array properties of an element. The HERS radius is taken to be the array's (side_length - 1) / 2.

Image.hersDescriptor(selectors, buckets, peakWidthScale)Dictionary
this: elementElementThe element with array properties.
selectorsList, default: nullThe array properties for which descriptors will be created. Selected array properties must be square, floating point arrays. Defaults to all array properties.
bucketsInteger, default: 100The number of HERS buckets. Defaults to 100.
peakWidthScaleFloat, default: 1The HERS peak width scale. Defaults to 1.0.