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diff --git a/ppmbrighten.html b/ppmbrighten.html index e78e583c..56188ffc 100644 --- a/ppmbrighten.html +++ b/ppmbrighten.html @@ -2,16 +2,14 @@ <HTML><HEAD><TITLE>Ppmbrighten User Manual</TITLE></HEAD> <BODY> <H1>ppmbrighten</H1> -Updated: 09 January 2003 +Updated: 26 October 2012 <BR> <A HREF="#index">Table Of Contents</A> -<A NAME="lbAB"> </A> <H2>NAME</H2> ppmbrighten - change a PPM image's Saturation and Value -<A NAME="lbAC"> </A> -<H2>SYNOPSIS</H2> +<H2 id="synopsis">SYNOPSIS</H2> <b>ppmbrighten</b> [<b>-normalize</b>] @@ -19,11 +17,12 @@ ppmbrighten - change a PPM image's Saturation and Value [<b>-value </b>[<b>+</b>|<b>-</b><i>value_percent</i>]] <i>ppmfile</i> -<?makeman .SH OPTION USAGE ?> -<P>All options can be abbreviated to their shortest unique prefix. +<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. -<A NAME="lbAD"> </A> -<H2>DESCRIPTION</H2> +<H2 id="description">DESCRIPTION</H2> <p>This program is part of <a href="index.html">Netpbm</a>. @@ -41,15 +40,14 @@ when we mean the number from the HSV color space, especially since "value" as a conventional English word has a much more abstract meaning. -<p>Value is a measure of how much total light intensity is in the -color, relative to some specified maximum (the PPM format is also -defined in terms of a specified maximum intensity -- For the purposes -of this program, they are the same). In particular, it is the -intensity of the most intense primary color component of the color -divided by the maximum intensity possible for a component. Zero Value -means black. White has full Value. +<p>Value is a measure of how bright the color is, relative to some specified +maximum (the PPM format is also defined in terms of a specified maximum +brightness -- For the purposes of this program, they are the same). In +particular, it is the brightness of the brightest primary color component of +the color divided by the maximum brightness possible for a component. Zero +Value means black. White has full Value. -<p>Hue is an indication of the secondary color with the same intensity +<p>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. @@ -68,33 +66,30 @@ increases it to full Value instead. you specify (e.g. it is already half saturated and you specify +200%), <b>ppmbrighten</b> increases it to full Saturation instead. -<p>For a simpler kind of brightening, you can use <b>pamfunc --multiplier</b> simply to increase the intensity of each pixel by a -specified per centage, clipping each RGB component where the -calculated intensity would exceed full intensity. Thus, the brightest -colors in the image would change chromaticity in addition to not -getting the specified intensity boost. For <em>decreasing</em> -brightness, <b>pamfunc</b> should do the same thing as +<p>For a simpler kind of brightening, you can use <b>pamfunc -multiplier</b> +simply to increase the brightness of each pixel by a specified per centage, +clipping each RGB component where the calculated brightness would exceed full +brightness. Thus, the brightest colors in the image would change chromaticity +in addition to not getting the specified brightness boost. +For <em>decreasing</em> brightness, <b>pamfunc</b> should do the same thing as <b>ppmbrighten</b>. <p><b>ppmflash</b> does another kind of brightening. It changes the color of each pixel to bring it a specified per centage closer to white. This increases the value and saturation. -<A NAME="examples"></a> -<H2>EXAMPLES</H2> +<H2 id="examples">EXAMPLES</H2> <p>To double the Value of each pixel: <pre> ppmbrighten -v 100 </pre> -<p>To double the Saturation and halve the value of each pixel: +<p>To double the Saturation and halve the Value of each pixel: <pre> ppmbrighten -s 100 -v -50 </pre> -<A NAME="options"></a> -<H2>OPTIONS</H2> +<H2 id="options">OPTIONS</H2> <DL> <DT><b>-value </b><i>value_percent</i> @@ -124,8 +119,7 @@ with a bogus error message. </DL> -<A NAME="lbAE"> </A> -<H2>SEE ALSO</H2> +<H2 id="seealso">SEE ALSO</H2> <A HREF="pnmnorm.html">pnmnorm</A>, <A HREF="ppmdim.html">ppmdim</A>, @@ -136,8 +130,7 @@ with a bogus error message. <A HREF="ppmhist.html">ppmhist</A>, <A HREF="ppm.html">ppm</A> -<A NAME="lbAF"> </A> -<H2>AUTHOR</H2> +<H2 id="author">AUTHOR</H2> <p>Copyright (C) 1990 by Brian Moffet. Copyright (C) 1989 by Jef Poskanzer. @@ -151,16 +144,14 @@ documentation. This software is provided "as is" without express or implied warranty. <HR> -<A NAME="index"> </A> -<H2>Table Of Contents</H2> +<H2 id="index">Table Of Contents</H2> <UL> -<LI><A HREF="#lbAB">NAME</A> -<LI><A HREF="#lbAC">SYNOPSIS</A> -<LI><A HREF="#lbAD">DESCRIPTION</A> +<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="#lbAE">SEE ALSO</A> -<LI><A HREF="#lbAF">AUTHOR</A> +<LI><A HREF="#seealso">SEE ALSO</A> +<LI><A HREF="#author">AUTHOR</A> </UL> </BODY> </HTML> |