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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.2//EN">
<HTML><HEAD><TITLE>Pnmmontage User Manual</TITLE></HEAD>
<BODY>
<H1>pnmmontage</H1>
Updated: 22 November 2012
<BR>
<A HREF="#index">Table Of Contents</A>
<H2>NAME</H2>
pnmmontage - create a montage of PNM images
<H2 id="synopsis">SYNOPSIS</H2>
<B>pnmmontage</B>
[<B>-header=</B><I>headerfile</I>]
[<B>-quality=</B><I>n</I>]
[<B>-prefix=</B><I>prefix</I>]
[<B>-0</B>|<B>-1</B>|<B>-2</B>|<B>...</B>|<B>-9</B>]
[<b>-data=</b><i>filename</i>]
<i>pnmfile</I>...
<H2 id="description">DESCRIPTION</H2>
<p>This program is part of <a href="index.html">Netpbm</a>.
<p><b>pnmmontage</b> packs images of differing sizes into a minimum-area
composite image.
<p>Areas of the output that cannot be occupied by an image are black.
<H2 id="options">OPTIONS</H2>
<DL COMPACT>
<DT><b>-data=</b><i>filename</i>
<dd>This option causes <b>pnmmontage</b> to write a file that describes
in machine-readable form the positions of the original images within
the packed image. Here is an example:
<pre>
<tt>
:0:0:227:298
../image1.ppm:0:0:227:149
../image2.ppm:0:149:227:149
</tt>
</pre>
<p>There is a line for each component image and one for the composite.
<p>The 5 fields on each line are:
<ol>
<li>source image name (or null string indicating the line for the composite
image)
<li>Column number of upper left corner of the image
<li>Row number of upper left corner of the image
<li>width of the image (columns)
<li>height of the image (rows)
</ol>
<p>This option was new in Netpbm 10.6 (July 2002).
<DT><B>-header=</B><i>filename</i>
<DD>Tells <B>pnmmontage</B> to write a C header file of the locations
of the original images within the packed image. Each original image
generates four #defines within the packed file: xxxX, xxxY, xxxSZX,
and xxxSZY, where xxx is the name of the file, converted to all
uppercase. The output also includes #defines OVERALLX and OVERALLY, which
specifies the total size of the montage image.
<p>Here is an example:
<pre>
<tt>
#define OVERALLX 227
#define OVERALLY 298
#define X 0
#define Y 0
#define SZX 227
#define SZY 149
#define X 0
#define Y 149
#define SZX 227
#define SZY 149
</tt>
</pre>
<DT><B>-prefix</B>
<DD>Tells <B>pnmmontage</B> to use the specified prefix on all of the
#defines it generates.
<DT><B>-quality</B>
<DD>Before attempting to place the subimages, <B>pnmmontage</B> will
calculate a minimum possible area for the montage; this is either the
total of the areas of all the subimages, or the width of the widest
subimage times the height of the tallest subimage, whichever is
greater. <B>pnmmontage</B> then initiates a problem-space search to
find the best packing; if it finds a solution that is (at least) as
good as the minimum area times the quality as a percent, it will break
out of the search. Thus, <B>-quality=100</B> will find the best possible
solution; however, it may take a very long time to do so. The default
is <B>-quality=200.</B>
<DT><B>-0</b>, <b>-1</b>, ... <b>-9</B>
<DD>These options control the quality at a higher level than
<B>-quality</B>; <B>-0</B> is the worst quality (pick the first
solution found), while <B>-9</B> is the best quality (perform an
exhaustive search of problem space for the absolute best packing).
The higher the number, the slower the computation. The default is
<B>-5</B>.
</DL>
<H2 id="notes">NOTES</H2>
<p>Using <B>-9</B> is very slow on all but the smallest image sets.
<p>The minimum area arrangement is often not a convenient shape. For
example, it might be a tall, thin column of images, when you'd rather
have something more square. To force a minimum width or height, you
can include a strut image - a black image that wide and one pixel high.
Similarly, you can use a vertical strut to force a minimum height.
<H2 id="seealso">SEE ALSO</H2>
<B><A HREF="pnmcat.html">pnmcat</A></B>,
<B><A HREF="pnmindex.html">pnmindex</A></B>,
<B><A HREF="pnm.html">pnm</A></B>,
<B><A HREF="pam.html">pam</A></B>,
<B><A HREF="pbm.html">pbm</A></B>,
<B><A HREF="pgm.html">pgm</A></B>,
<B><A HREF="ppm.html">ppm</A></B>
<H2 id="history">HISTORY</H2>
<p><b>pnmmontage</b> was new in Netpbm 9.10 (January 2001).
<H2 id="author">AUTHOR</H2>
Copyright (C) 2000 by Ben Olmstead.
<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="#notes">NOTES</A>
<LI><A HREF="#seealso">SEE ALSO</A>
<LI><A HREF="#history">HISTORY</A>
<LI><A HREF="#author">AUTHOR</A>
</UL>
</BODY>
</HTML>
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