im_stats - calculate many image statistics in a single pass
Find many image statistics in a single pass through the PELs. Returns a
DOUBLEMASK of 6 columns by n+1 (where n is number of bands in image in)
rows. Columns are statistics, and are, in order: minimum, maximum,
sum, sum of squares, mean, standard deviation. Row 0 has statistics for
all bands together, row 1 has stats for band 1, and so on.
Non-complex images only!
NULL on error.
National Gallery, 1992
24 October 1992