Usage

centroid file [debug] [box=] [sky=]

This routine computes the location of the object by calculating the centroid to the image. The sky value may be entered in the command line to have the bias values removed before the moments are calculated.

box=

limits the region over which the calculation applies. See discussion box specification.

sky=

subtracts specified bias level before performing calculation.

NOTE: sort of a "modified" centroid is used in that negative values are not used in the centroid calculation.