65 lines
1.6 KiB
HTML
65 lines
1.6 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 ppmrelief</TITLE>
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</HEAD><BODY>
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<H1>ppmrelief</H1>
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Section: User Commands (1)<BR>Updated: 11 January 1991<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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ppmrelief - run a Laplacian relief filter on a portable pixmap
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<A NAME="lbAC"> </A>
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<H2>SYNOPSIS</H2>
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<B>ppmrelief</B>
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[<I>ppmfile</I>]
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<A NAME="lbAD"> </A>
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<H2>DESCRIPTION</H2>
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Reads a portable pixmap as input.
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Does a Laplacian relief filter, and writes a portable pixmap as output.
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<A NAME="ixAAC"></A>
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<P>
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The Laplacian relief filter is described in "Beyond Photography" by Holzmann,
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equation 3.19.
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It's a sort of edge-detection.
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<A NAME="ixAAD"></A>
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<A NAME="lbAE"> </A>
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<H2>SEE ALSO</H2>
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<A HREF="/cgi-bin/man/man2html?1+pgmbentley">pgmbentley</A>(1), <A HREF="/cgi-bin/man/man2html?1+pgmoil">pgmoil</A>(1), <A HREF="/cgi-bin/man/man2html?5+ppm">ppm</A>(5)
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<A NAME="lbAF"> </A>
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<H2>AUTHOR</H2>
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Copyright (C) 1990 by Wilson Bent (<A HREF="mailto:whb@hoh-2.att.com">whb@hoh-2.att.com</A>)
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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">SEE ALSO</A><DD>
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<DT id="5"><A HREF="#lbAF">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: 00:05:25 GMT, March 31, 2021
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