Manual: pnminvert

Pnminvert User Manual(1)			   General Commands Manual			    Pnminvert User Manual(1)

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 complementary 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.

OPTIONS
       There are no command line options defined specifically for pnminvert, but it recognizes the  options  common  to	 all
       programs based on libnetpbm (See	 Common Options .)

SEE ALSO
       pnm(1)

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(1)