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| author | giraffedata <giraffedata@9d0c8265-081b-0410-96cb-a4ca84ce46f8> | 2019-03-24 18:53:09 +0000 |
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| committer | giraffedata <giraffedata@9d0c8265-081b-0410-96cb-a4ca84ce46f8> | 2019-03-24 18:53:09 +0000 |
| commit | dbf52ba7dbcbd68f078aeb154433011b2639b631 (patch) | |
| tree | 56b6e0a80275532c19e5febf11e7f9babb894eb4 | |
| parent | c559f574d8e1194fcc2c9135ed9a8c1ac98a38cc (diff) | |
| download | netpbm-mirror-dbf52ba7dbcbd68f078aeb154433011b2639b631.tar.gz netpbm-mirror-dbf52ba7dbcbd68f078aeb154433011b2639b631.tar.xz netpbm-mirror-dbf52ba7dbcbd68f078aeb154433011b2639b631.zip | |
miscellaneous update
git-svn-id: http://svn.code.sf.net/p/netpbm/code/userguide@3580 9d0c8265-081b-0410-96cb-a4ca84ce46f8
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diff --git a/pamhue.html b/pamhue.html new file mode 100644 index 00000000..7cc76729 --- /dev/null +++ b/pamhue.html @@ -0,0 +1,112 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.2//EN"> +<HTML><HEAD><TITLE>Pamhue User Manual</TITLE></HEAD> +<BODY> +<H1>pamhue</H1> +Updated: 07 January 2018 +<BR> +<A HREF="#index">Table Of Contents</A> + +<H2>NAME</H2> +pamhue - change a Netpbm image's Hues + +<H2 id="synopsis">SYNOPSIS</H2> + +<b>pamhue</b> +[<b>-huechange=</b>[<i>degrees</i>]] +<i>filename</i> + +<P>Minimum unique abbreviation of option is acceptable. You may use +double hyphens instead of single hyphen to denote options. You may use +white space in place of the equals sign to separate an option name +from its value. + +<H2 id="description">DESCRIPTION</H2> + +<p>This program is part of <a href="index.html">Netpbm</a>. + +<p><b>pamhue</b> shifts the hue of every pixel in an image by the same amount. + +<p>If the image is in a black and white or grayscale format, the image is +fully desaturated, so the hue is meaningless and <b>pamhue</b> leaves the +image unchanged. + +<p>Hue-Saturation-Value, or HSV, is one way to represent a color, like the +more well-known RGB. Hue is an indication of the secondary color with the +same brightness that most closely approximates the color. A secondary color +is made of a combination of at most two of the primary colors. + +<p>In the HSV model, hue is an angular position on the color wheel. + +<p>With <b>pamhue</b>, you indicate an angle by which to change all the hues, +in the image; for example you can say move it 60 degrees clockwises. That +would change all red pixels to yellow and all yellow pixels to green, etc. + +<p>To modify the saturation and value components of the colors, use +<b>pambrighten</b>. + + +<H2 id="examples">EXAMPLES</H2> + +<p>To shift the color of each pixel 120 degrees clockwise: +<pre> +pamhue -huechange=120 +</pre> + +<p>To shift the color of each pixel 120 degrees counterclockwise: +<pre> +pamhue -huechange=-120 +</pre> + + +<H2 id="options">OPTIONS</H2> + +<DL> +<DT><b>-huechange=</b><i>degrees</i> + +<DD>This option specifies the amount to shift each color. It is in degrees, +with positive meaning clockwise and negative meaning counterclockwise. It may +be fractional and may be more than a full revolution. + +<p>This option is mandatory. + +</DL> + +<h2 id="history">HISTORY</h2> + +<p><b>pamhue</b> was new in Netpbm 10.86 (March 2019). + + +<H2 id="seealso">SEE ALSO</H2> + +<A HREF="pambrighten.html">pambrighten</A>, +<A HREF="ppmflash.html">ppmflash</A>, +<A HREF="ppmhist.html">ppmhist</A>, +<A HREF="ppm.html">ppm</A> + +<H2 id="author">AUTHOR</H2> + +<p>Copyright (C) 2018 by Willem van Schaik. +Copyright (C) 1990 by Brian Moffet. +Copyright (C) 1989 by Jef Poskanzer. + +<P> +Permission to use, copy, modify, and distribute this software and its +documentation for any purpose and without fee is hereby granted, provided +that the above copyright notice appear in all copies and that both that +copyright notice and this permission notice appear in supporting +documentation. This software is provided "as is" without express or +implied warranty. + +<HR> +<H2 id="index">Table Of Contents</H2> +<UL> +<LI><A HREF="#synopsis">SYNOPSIS</A> +<LI><A HREF="#description">DESCRIPTION</A> +<LI><A HREF="#examples">EXAMPLES</A> +<LI><A HREF="#options">OPTIONS</A> +<LI><A HREF="#history">HISTORY</A> +<LI><A HREF="#seealso">SEE ALSO</A> +<LI><A HREF="#author">AUTHOR</A> +</UL> +</BODY> +</HTML> |