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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.3//EN">
<html><head><title>Pamoil User Manual</title></head>
<body>
<h1>pamoil</h1>
Updated: 25 June 2001
<br>
<a href="#index">Table Of Contents</a>
<h2>NAME</h2>
pamoil - turn a PAM image into an oil painting
<h2 id="synopsis">SYNOPSIS</h2>
<b>pamoil</b>
[<b>-n</b> <i>N</i>]
[<i>pamfile</i>]
<h2 id="description">DESCRIPTION</h2>
<p>This program is part of <a href="index.html">Netpbm</a>.
<p><b>pamoil</b> reads a Netpbm image as input and does an "oil
transfer", and writes the same type of Netpbm image as output.
<p>The oil transfer is described in "Beyond Photography" by
Holzmann, chapter 4, photo 7. It's a sort of localized smearing.
<p>The smearing works like this: First, assume a grayscale image. For
each pixel in the image, <b>pamoil</b> looks at a square neighborhood
around it. <b>pamoil</b> determines what is the most common pixel
intensity in the neighborhood, and puts a pixel of that intensity into
the output in the same position as the input pixel.
<p>For color images, or any arbitrary multi-channel image,
<b>pamoil</b> computes each channel (e.g. red, green, and blue)
separately the same way as the grayscale case above.
<p>At the edges of the image, where the regular neighborhood would run
off the edge of the image, <b>pamoil</b> uses a clipped neighborhood.
<h2 id="options">OPTIONS</h2>
<p>In addition to the options common to all programs based on libnetpbm
(most notably <b>-quiet</b>, see <a href="index.html#commonoptions">
Common Options</a>), <b>pamoil</b> recognizes the following
command line option:
<dl compact>
<dt><b>-n</b> <i>size</i>
<dd>This is the size of the neighborhood used in the smearing. The
neighborhood is this many pixels in all four directions.
<p>The default is 3.
</dl>
<h2 id="seealso">SEE ALSO</h2>
<b><a href="pgmbentley.html">pgmbentley</a></b>,
<b><a href="ppmrelief.html">ppmrelief</a></b>,
<b><a href="ppm.html">ppm</a></b>
<h2 id="author">AUTHOR</h2>
<p>This program is based on pgmoil Copyright (C) 1990 by Wilson Bent
(<a href="mailto:whb@hoh-2.att.com">whb@hoh-2.att.com</a>)
<p>Modified to ppm by Chris Sheppard, June 25, 2001
<p>Modified to pnm, using pam functions, by Bryan Henderson June 28,
2001.
<hr>
<h2 id="index">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="#author">AUTHOR</a>
</ul>
</body>
</html>
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