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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)
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