histogram — A composite type used as record output of the ST_Histogram and ST_ApproxHistogram functions.
A composite type used as record outputs of the ST_Histogram ST_ApproxHistogram functions. Note that depending on exclude_nodata_value of function, may or may not contain nodata pixels.
Each histogram record in results corresponds to a bin for a selected raster band.
min double precisionminimum pixel value in this bin
max double precisionMaximum pixel value in this bin.
count integercount of pixels in this bin.
percent double precisionPercent of pixels of the overall population in this bin.