Help for GEN


PURPOSE:

 GEN  generates a 3 dimensional picture, given an initial value,
 a line increment, a sample increment, and a band increment.  It
 is  used  primarily  to  format  disk  data  sets  and to begin
 generation of test pictures.

OPERATION:

 The  image  file  generated is in three dimensions, LINE, SAMP,
 and BAND.  The output DN at SAMP I, LINE J, BAND K will be:

 (IVAL + (I-1)*SINC + (J-1)*LINC + (K-1)*BINC) (MODULO MOD)
 If  floating point output is specified, then the calculation is
 carried  out  using  floating point arithmetic.  The parameters
 IVAL, SINC, LINC, BINC, and MOD will be treated as real numbers
 in the program.

EXECUTION:

	GEN can be invoked by typing
		GEN OUT NL NS NB PARAMS
	where PARAMS consists of the following parameters:
		FORMAT	IVAL 	SINC     LINC     
		BINC	MOD     FLAT
	Each is described in their respective  parameter section.
TIMING:
	 None available for the VAX

WRITTEN BY: H. J. Frieden      12/22/70

COGNIZANT PROGRAMMER: R. G. Deen   2/12/90

REVISION: 1           Ron Alley     3/6/91