103 lines
2.2 KiB
HTML
103 lines
2.2 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
|
<html>
|
|
<head>
|
|
<title>ALE User Manual: EPPM Files</title>
|
|
<style type="text/css">
|
|
TABLE.ba { max-width: 678; text-align: center; padding-bottom: 15; padding-top: 5}
|
|
TABLE.inline { padding-right: 300; clear: left}
|
|
TD.text_table {padding-left: 2; padding-right: 2; border-width: 1}
|
|
H2 {clear: left}
|
|
P {max-width: none; padding-right: 300; clear: left}
|
|
BLOCKQUOTE {padding-right: 400 }
|
|
LI {max-width: 640; clear: left}
|
|
P.footer {max-width: none; width: auto; padding-left: 0}
|
|
P.header {max-width: none; width: auto; padding-left: 0}
|
|
HR.main {max-width: 640; clear: left; padding-left: 0; margin-left: 0}
|
|
HR.footer {clear: both}
|
|
</style>
|
|
|
|
</head>
|
|
<body>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
<table align=right valign=top width=160>
|
|
<td valign=top height=600 width=160>
|
|
<a href="http://auricle.dyndns.org/ALE/">
|
|
<big>ALE</big>
|
|
<br>
|
|
Image Processing Software
|
|
<br>
|
|
<br>
|
|
<small>Deblurring, Anti-aliasing, and Superresolution.</small></a>
|
|
<br><br>
|
|
<big>
|
|
Local Operation
|
|
</big>
|
|
<hr>
|
|
localhost<br>
|
|
2684415918<br>
|
|
</table>
|
|
|
|
|
|
|
|
|
|
<p><b>[ <a href="../">Up</a> ]</b></p>
|
|
<h1>EPPM Files</h1>
|
|
|
|
<p>EPPM is an extension to the PPM file format that allows specification of
|
|
metadata. The header of an EPPM file conforms to the following template:
|
|
|
|
<pre>
|
|
P6#E
|
|
# Tag1: Value
|
|
# Tag2: Value
|
|
# Tag3: Value
|
|
# .
|
|
# .
|
|
# .
|
|
Width Height Maxval
|
|
Data
|
|
</pre>
|
|
|
|
<p>Tags recognized by ALE are outlined below.
|
|
|
|
<h2>Black level</h2>
|
|
|
|
<P>The black level tag specifies a value that should be subtracted from
|
|
all pixels in order to achieve linearity. A modified version of dcraw (<a
|
|
href="/darcs/dcraw">darcs repository</a>) can be used to generate files
|
|
containing this tag.
|
|
|
|
<pre>
|
|
# Black-level: <value>
|
|
</pre>
|
|
|
|
<h2>Exposure tags</h2>
|
|
|
|
<p>Exposure tags can be used for determining tonal registration through
|
|
specification of shutter speed, aperture, and ISO sensitivity (or gain).
|
|
|
|
<pre>
|
|
# Shutter: <value>
|
|
# Shutter: 1/<value>
|
|
# Aperture: <f-number>
|
|
# ISO: <value>
|
|
# Gain: <value>
|
|
</pre>
|
|
|
|
|
|
|
|
|
|
<br>
|
|
<hr>
|
|
<i>Copyright 2003, 2004 <a href="mailto:dhilvert@auricle.dyndns.org">David Hilvert</a></i>
|
|
<p>Verbatim copying and distribution of this entire article is permitted in any medium, provided this notice is preserved.
|
|
|
|
|
|
</body>
|
|
</html>
|