Image statistics

• Operator reference

These are here, under Transformers, because they compute results per row, column, band or tile, and return them as an image.

We have

Op	Result per unit (row, column, band, tile)
arg.max	First index where the maximal value is reached
arg.min	First index where the minimal value is reached
arg.ge	First index where value greater or equal than threshold
arg.gt	First index where value greater than threshold
arg.le	First index where value less or equal than threshold
arg.lt	First index where value less than threshold
cumulative	A prefix sum over the unit
histogram	Histogram of the unit
max	The maximum of the values
mean	The arithmetic mean of the values
median	The median of the values
min	The minimum of the values
otsu	The otsu threshold for the values
rank	The value of the specified rank of the values
stddev	The standard deviation of the values
sum	The sum of all values
sumsquared	The sum of all squared values
variance	The variance of the values
profile	Top/Left profile of the unit

Note that not all operations are sensible for all units.

Note that the index operations are useful to feed take operators.