Pnminvert User Manual

Section: Misc. Reference Manual Pages (0)
Updated: 08 August 1989
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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.

 

SEE ALSO

pnm(1)

 

AUTHOR

Copyright (C) 1989 by Jef Poskanzer.


 

Index

NAME
SYNOPSIS
DESCRIPTION
SEE ALSO
AUTHOR

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