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Pnminvert User Manual(0)			      Pnminvert	User Manual(0)

NAME
       pnminvert - invert a PNM	image

SYNOPSIS
       pnminvert

       [pnmfile]

DESCRIPTION
       This program is part of Netpbm(1).

       pnminvert  reads	 a PNM image as	input, inverts it black	for white, and
       produces	a PNM image as output.

       If the image is grayscale, pnminvert replaces a pixel with one of  com-
       plementary  brightness,	i.e.  if the original pixel has	gamma-adjusted
       gray value G, the output	pixel has gray value maxval - G.

       If the image is color, pnminvert	inverts	each individual	RGB  component
       the same	as for a grayscale image.

SEE ALSO
       pnm(5)

AUTHOR
       Copyright (C) 1989 by Jef Poskanzer.

DOCUMENT SOURCE
       This  manual  page was generated	by the Netpbm tool 'makeman' from HTML
       source.	The master documentation is at

	      http://netpbm.sourceforge.net/doc/pnminvert.html

netpbm documentation		08 August 1989	      Pnminvert	User Manual(0)

NAME | SYNOPSIS | DESCRIPTION | SEE ALSO | AUTHOR | DOCUMENT SOURCE

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