pgmramp - generate a grayscale ramp
SYNOPSIS
pgmramp -lr|-tb | -rectangle|-ellipse width height
DESCRIPTION
Generates a graymap of the specified size containing a
black-to-white ramp. These ramps are useful for multiply
ing with other images, using the pnmarith tool.
OPTIONS
-lr A left to right ramp.
-tb A top to bottom ramp.
-rectangle
A rectangular ramp.
-ellipse
An elliptical ramp.
All flags can be abbreviated to their shortest unique pre
fix.
SEE ALSO
pnmarith(1), pgm(5)
AUTHOR
Copyright (C) 1989 by Jef Poskanzer.
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