1Pnminvert User Manual(0)                              Pnminvert User Manual(0)
2
3
4

NAME

6       pnminvert - invert a PNM image
7
8

SYNOPSIS

10       pnminvert
11
12       [pnmfile]
13
14

DESCRIPTION

16       This program is part of Netpbm(1).
17
18       pnminvert  reads  a PNM image as input, inverts it black for white, and
19       produces a PNM image as output.
20
21       If the image is grayscale, pnminvert replaces a pixel with one of  com‐
22       plementary  brightness,  i.e.  if the original pixel has gamma-adjusted
23       gray value G, the output pixel has gray value maxval - G.
24
25       If the image is color, pnminvert inverts each individual RGB  component
26       the same as for a grayscale image.
27
28

SEE ALSO

30       pnm(1)
31
32

AUTHOR

34       Copyright (C) 1989 by Jef Poskanzer.
35

DOCUMENT SOURCE

37       This  manual  page was generated by the Netpbm tool 'makeman' from HTML
38       source.  The master documentation is at
39
40              http://netpbm.sourceforge.net/doc/pnminvert.html
41
42netpbm documentation            08 August 1989        Pnminvert User Manual(0)
Impressum