SECTION./CONV
APPLY/CONVERSION IMTB ima tab threshold
	convert a "mask" image to a table 
APPLY/CONVERSION TBIM tab ima npx1,npx2 sta1,sta2,stp1,stp2 bg,fg
	convert a table to a "mask" image
SECTION./EDGE
APPLY/EDGE inframe outframe [thresh]
	do edge detection on an image
SECTION./MAP
APPLY/MAP outframe = inframe mapframe control_flags
	use an image frame like a Lookup Table
SECTION./THIN
APPLY/THIN inframe outframe
	apply thinning algorithm
