SECTION./COSM
FILTER/COSMIC inframe  outframe sky,gain,ron,[ns],[rc] [mask]
                                                  remove cosmic ray events.
SECTION./DIGI
FILTER/DIGITAL frame outframe [filter_specs] [subimage] [options]
	use digital filter on an image
SECTION./GAUS
FILTER/GAUSS in out [radx,rady] [gauss_specs] [subima] [filtnam] [options]
	use Gaussian filter on an image
SECTION./MAX 
FILTER/MAX frame outfram [xyradius] [subima] [options]
	apply maximum filter to an image
SECTION./MEDI
FILTER/MEDIAN frame outfram [filt_specs] [flag] [subima] [options]
	smooth an image with median filter
SECTION./MIN 
FILTER/MIN frame outfram [xyradius] [subima] [options]
	apply minimum filter to an image
SECTION./SMOO
FILTER/SMOOTH frame outfram [filter_specs] [flag] [subima] [options]
	smooth an image by averaging
