fitsfilter performs a median filter average of a FITS image, or corrects for non-uniform background by fitting a nth-order polynomial surface. 

fitsfilter: usage: [options] file.fts ...

Purpose: perform a filter on given fits files IN PLACE.

  -f file: name of file containing filenames

  -l n   : apply order-n 2d polynomial flat-field

  -m s   : median filter of size s

© Robert Mutel 2018