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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 "Pamedge User Manual" 0 "11 January 2003" "netpbm documentation"
+
+.SH NAME
+pamedge - edge-detect an image
+
+.UN synopsis
+.SH SYNOPSIS
+
+\fBpamedge\fP [\fIimagefile\fP]
+
+.UN description
+.SH DESCRIPTION
+.PP
+This program is part of
+.BR "Netpbm" (1)\c
+\&.
+.PP
+\fBpamedge\fP reads a Netpbm image (PNM or PAM) and produces
+an image that outlines the edges.
+.PP
+The output image is of the same type as the input, except that the
+maxval of the output is at least 255 and if the input is PBM, the output
+is PGM.
+.PP
+You can pipe the result through \f(CWpamditherbw -threshold\fP and play
+with the threshold value to get a PBM (bilevel image) of the edges.
+
+The edge detection technique used is to take the Pythagorean sum of
+two Sobel gradient operators at 90 degrees to each other.  For more
+details see "Digital Image Processing" by Gonzalez and
+Wintz, chapter 7.
+.PP
+The maxval of the output is the same as the maxval of the input, except at
+least 255.  The effect is better with larger maxvals, so you may want to
+increase the maxval of the input by running it through \fBpamdepth\fP first.
+
+.UN seealso
+.SH SEE ALSO
+.BR "pgmenhance" (1)\c
+\&,
+.BR "pamditherbw" (1)\c
+\&,
+.BR "pamdepth" (1)\c
+\&,
+.BR "pammasksharpen" (1)\c
+\&,
+.BR "pamsharpness" (1)\c
+\&,
+.BR "pamsharpmap" (1)\c
+\&,
+.BR "pam" (5)\c
+\&,
+.BR "pnm" (5)\c
+\&
+
+.UN history
+.SH HISTORY
+.PP
+\fBpamedge\fP was added to Netpbm in Release 10.14 (March 2003).
+It replaced \fBpgmedge\fP, which was the same thing, but worked only on
+PGM and PBM images.
+
+
+.UN author
+.SH AUTHOR
+
+Copyright (C) 1991 by Jef Poskanzer.  Adapted to \fBpnmedge\fP Peter
+Kichgessner in 1995, and then to \fBpamedge\fP by Bryan Henderson in
+2003.
+.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/pamedge.html
+.PP
+\ No newline at end of file