Level 2 Help for INTERLV

Name of a single input file.

Name of a single output file.

The size parameter determines the boundaries in the input
file form which the interleave is to take place.  It is specified
as (SL,SS,NL,NS), where
	SL is the starting line
	SS is the starting sample
	NL is the number of lines to be interleaved
	NS is the number of samples(pixels) to be interleaved in each line

The number of pixels to be offset (shifted), referring to the even 
numbered lines.  Shifting by zero pixels will result in a simple 
image copy operation.

The direction of pixels to be offset (shifted), either to the left or 
or right and referring only to the even numbered lines.  The default 
is to shift to the left.