80 lines
1.9 KiB
HTML
80 lines
1.9 KiB
HTML
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<HTML><HEAD><TITLE>Man page of pgmenhance</TITLE>
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</HEAD><BODY>
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<H1>pgmenhance</H1>
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Section: User Commands (1)<BR>Updated: 13 January 1989<BR><A HREF="#index">Index</A>
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<A HREF="/cgi-bin/man/man2html">Return to Main Contents</A><HR>
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<A NAME="ixAAB"></A>
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<A NAME="lbAB"> </A>
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<H2>NAME</H2>
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pgmenhance - edge-enhance a portable graymap
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<A NAME="lbAC"> </A>
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<H2>SYNOPSIS</H2>
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<B>pgmenhance</B>
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[<I>-N</I>]
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[<I>pgmfile</I>]
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<A NAME="lbAD"> </A>
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<H2>DESCRIPTION</H2>
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Reads a portable graymap as input.
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Enhances the edges, and writes a portable graymap as output.
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<A NAME="ixAAC"></A>
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<P>
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The edge enhancing technique is taken from Philip R. Thompson's "xim"
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program, which in turn took it from section 6 of "Digital Halftones by
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Dot Diffusion", D. E. Knuth, ACM Transaction on Graphics Vol. 6, No. 4,
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October 1987, which in turn got it from two 1976 papers by J. F. Jarvis
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et. al.
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<A NAME="lbAE"> </A>
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<H2>OPTIONS</H2>
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<P>
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The optional
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<I>-N</I>
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flag should be a digit from 1 to 9.
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1 is the lowest level of enhancement, 9 is the highest,
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The default is 9.
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<A NAME="lbAF"> </A>
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<H2>SEE ALSO</H2>
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<A HREF="/cgi-bin/man/man2html?1+pgmedge">pgmedge</A>(1), <A HREF="/cgi-bin/man/man2html?5+pgm">pgm</A>(5), <A HREF="/cgi-bin/man/man2html?5+pbm">pbm</A>(5)
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<A NAME="lbAG"> </A>
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<H2>AUTHOR</H2>
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Copyright (C) 1989 by Jef Poskanzer.
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<P>
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<HR>
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<A NAME="index"> </A><H2>Index</H2>
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<DL>
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<DT id="1"><A HREF="#lbAB">NAME</A><DD>
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<DT id="2"><A HREF="#lbAC">SYNOPSIS</A><DD>
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<DT id="3"><A HREF="#lbAD">DESCRIPTION</A><DD>
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<DT id="4"><A HREF="#lbAE">OPTIONS</A><DD>
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<DT id="5"><A HREF="#lbAF">SEE ALSO</A><DD>
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<DT id="6"><A HREF="#lbAG">AUTHOR</A><DD>
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</DL>
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<HR>
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This document was created by
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<A HREF="/cgi-bin/man/man2html">man2html</A>,
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using the manual pages.<BR>
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Time: 00:05:22 GMT, March 31, 2021
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</BODY>
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</HTML>
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