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+.\" This man page was generated by the Netpbm tool 'makeman' from HTML source.
+.\" Do not hand-hack it!  If you have bug fixes or improvements, please find
+.\" the corresponding HTML page on the Netpbm website, generate a patch
+.\" against that, and send it to the Netpbm maintainer.
+.TH "Pnminvert User Manual" 0 "08 August 1989" "netpbm documentation"
+
+.UN lbAB
+.SH NAME
+
+pnminvert - invert a PNM image
+
+.UN lbAC
+.SH SYNOPSIS
+
+\fBpnminvert\fP
+
+[\fIpnmfile\fP]
+
+.UN lbAD
+.SH DESCRIPTION
+.PP
+This program is part of
+.BR "Netpbm" (1)\c
+\&.
+.PP
+\fBpnminvert\fP reads a PNM image as input, inverts it black for
+white, and produces a PNM image as output.
+.PP
+If the image is grayscale, \fBpnminvert\fP 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.
+.PP
+If the image is color, \fBpnminvert\fP inverts each individual RGB
+component the same as for a grayscale image.
+
+.UN lbAE
+.SH SEE ALSO
+.BR "pnm" (5)\c
+\&
+
+.UN lbAF
+.SH AUTHOR
+
+Copyright (C) 1989 by Jef Poskanzer.
+.SH DOCUMENT SOURCE
+This manual page was generated by the Netpbm tool 'makeman' from HTML
+source.  The master documentation is at
+.IP
+.B http://netpbm.sourceforge.net/doc/pnminvert.html
+.PP
+\ No newline at end of file