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| author | giraffedata <giraffedata@9d0c8265-081b-0410-96cb-a4ca84ce46f8> | 2006-12-25 03:06:05 +0000 |
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| committer | giraffedata <giraffedata@9d0c8265-081b-0410-96cb-a4ca84ce46f8> | 2006-12-25 03:06:05 +0000 |
| commit | 1017cbebe5d5edd859e0fddad0a8600f509f4821 (patch) | |
| tree | 78bdf336648566f7a7d55f42837357dea3dd674c /pnmsmooth.html | |
| parent | 16f2ac126651015a376eba864a3a35f738b0b25a (diff) | |
| download | netpbm-mirror-1017cbebe5d5edd859e0fddad0a8600f509f4821.tar.gz netpbm-mirror-1017cbebe5d5edd859e0fddad0a8600f509f4821.tar.xz netpbm-mirror-1017cbebe5d5edd859e0fddad0a8600f509f4821.zip | |
Place user guide into Subversion repository
git-svn-id: http://svn.code.sf.net/p/netpbm/code/userguide@181 9d0c8265-081b-0410-96cb-a4ca84ce46f8
Diffstat (limited to 'pnmsmooth.html')
| -rw-r--r-- | pnmsmooth.html | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/pnmsmooth.html b/pnmsmooth.html new file mode 100644 index 00000000..4eb6f837 --- /dev/null +++ b/pnmsmooth.html @@ -0,0 +1,113 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.2//EN"> +<HTML><HEAD><TITLE>Pnmsmooth User Manual</TITLE></HEAD> +<BODY> +<H1>pnmsmooth</H1> +Updated: 4 December 1994 +<BR> +<A HREF="#index">Table Of Contents</A> + +<h2>NAME</H2> + +pnmsmooth - smooth out an image + +<H2 id="synopsis">SYNOPSIS</H2> + +<B>pnmsmooth</B> + +[<b>-width=</b><i>cols</i>] +[<b>-height=</b><i>rows</i>] + +[<B>-dump</B>=<I>dumpfile</I>] + +[<I>pnmfile</I>] + +<p>Deprecated backward-compatibility option: + +[<b>-size</b>] + +<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>pnmsmooth</b> smoothes out an image by replacing each pixel with +the average of its width X height neighbors. It is implemented as a +progam that generates a PGM convolution matrix and then invokes +<b>pnmconvol</b> with it. + +<H2 id="options">OPTIONS</H2> + +<DL COMPACT> +<dt><b>-width=</b><i>cols</i> +<dt><b>-height</b>=<i>rows</i> + +<dd> +These options specify the dimensions of the convolution matrix. +Default dimensions are 3 wide and 3 high. Each dimension must be odd. +The maximum size of the convolution matrix is limited by the maxval of +the image such that width * height * 2 must not exceed the maxval. +(use <b>pamdepth</b> to increase the maxval if necessary). + +<p>These options were new in Netpbm 10.32 (February 2006). Before that, +use <b>-size</b>. + +<DT><B>-size</b> + +<DD>This deprecated option exists in current Netpbm for backward +compatibility. It was obsoleted by <b>-width</b> and <b>-height</b> +in Netpbm 10.32 (February 2006). + +<p>When you use this option, the first two program arguments are the width +and height, respectively, of the convolution matrix and do the same thing +as the <b>-width</b> and <b>-height</b> option values. The third +(optional) program argument is the input file name. + +<p>In reality, in old <b>pnmsmooth</b>, the width and height are two +values of the <b>-size</b> option, but the modern Netpbm command syntax +paradigm doesn't allow an option with multiple values, so instead +<b>-size</b> is an option with no value and width and height are program +arguments. That has the fortunate effect of making the following command +mean the same in current <b>pnmsmooth</b> as in old <b>pnmsmooth</b>: +<pre> +<kbd> + pnmsmooth -size 5 5 infile.ppm >outfile.ppm +</kbd> +</pre> + +<DT><B>-dump=</b><i>dumpfile</i> + +<DD>This options makes <b>pnmsmooth</b> only generate and save the +convolution file. It does not invoke <b>pnmconvol</B> and does not +produce an output image. + +</DL> + + + +<H2 id="seealso">SEE ALSO</H2> + +<A HREF="pnmconvol.html">pnmconvol</A>, +<A HREF="pnm.html">pnm</A> + +<h2 id="history">HISTORY</h2> + +<p>Before Netpbm 10.32 (February 2006), <b>pnmsmooth</b> did not use +the modern Netpbm command line parser, so had an unconventional command line +syntax. Most importantly, you could not use an equal size or double +hyphens in the options. + +<HR> +<A NAME="index"> </A> +<H2>Table Of Contents</H2> +<UL> +<LI><A HREF="#synopsis">SYNOPSIS</A> +<LI><A HREF="#description">DESCRIPTION</A> +<LI><A HREF="#options">OPTIONS</A> +<LI><A HREF="#seealso">SEE ALSO</A> +<LI><A HREF="#history">HISTORY</A> +</UL> +</BODY> +</HTML> |