72 lines
2.1 KiB
HTML
72 lines
2.1 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 ppmbrighten</TITLE>
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</HEAD><BODY>
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<H1>ppmbrighten</H1>
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Section: User Commands (1)<BR>Updated: 20 Nov 1990<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="lbAB"> </A>
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<H2>NAME</H2>
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ppmbrighten - change an images Saturation and Value from an HSV map
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<A NAME="lbAC"> </A>
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<H2>SYNOPSIS</H2>
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ppmbrighten [-n] [-s <+- saturation>] [-v <+- value>] <ppmfile>
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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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Converts the image from RGB space to HSV space and changes
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the Value by <+- value> as a percentage.
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Likewise with the Saturation.
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Doubling the Value would involve
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<P>
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ppmbrighten -v 100
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<P>
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to add 100 percent to the Value.
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<P>
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The 'n' option normalizes the Value to exist between 0 and 1
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(normalized).
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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+pgmnorm">pgmnorm</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 Brian Moffet
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Copyright (C) 1989 by Jef Poskanzer.
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<P>
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted, provided
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that the above copyright notice appear in all copies and that both that
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copyright notice and this permission notice appear in supporting
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documentation. This software is provided "as is" without express or
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implied warranty.
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<A NAME="lbAG"> </A>
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<H2>NOTES</H2>
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This program does not change the number of colors.
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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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<DT id="6"><A HREF="#lbAG">NOTES</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: 00:05:24 GMT, March 31, 2021
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</BODY>
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</HTML>
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