mauro/ale
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

initial commit

Browse Source
This commit is contained in:
Mauro Torrez
2022-07-30 14:46:04 -03:00
commit 47650131de
312 changed files with 212465 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

91
doc/html-original/ALE/download/ale-0.7.x-user/rendering/psf/index.html Normal file
View File

@@ -0,0 +1,91 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>ALE User Manual: Point Spread Functions</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>ALE Point Spread Functions</h1>
<p>The ALE Irani-Peleg renderer uses a point-spread function to model the optical
and electronic properties of the capture device used. The PSF can be specified
in terms of one linear and one non-linear component.
<h3>PSF specification</h3>
<p>The PSF can be explicitly specified by using one or both of the psf options.
<pre>
--lpsf &lt;p> Set linear colorspace point-spread function to &lt;p>
--nlpsf &lt;p> Set non-linear colorspace point-spread function to &lt;p>
</pre>
Available explicit point-spread functions are as follows:
<pre>
box=&lt;d> Set the PSF to a box filter with diameter &lt;d>.
circle=&lt;d> Set the PSF to a circular filter with diameter &lt;d>. [ALE 0.7.1 and later.]
stdin Specify a custom filter at runtime.
stdin_vg stdin with vertically-oriented gaps after every 8th pixel.
&lt;p>+&lt;p> Summation of two functions
&lt;p>^&lt;p> Convolution of two functions. [ALE 0.7.3 and later.]
&lt;n>*&lt;p> Multiplication by a scalar &lt;n>. [ALE 0.7.3 and later.]
</pre>
If a device is known to ALE, then its PSF can be implicitly set with the
<code>--device</code> option. (See the <a href="../../device/">device</a> page
for more information.) If a device is not specified, then the default linear
PSF component is <code>box=1</code>. The non-linear PSF component is disabled
by default.
<h3>Determining the PSF</h3>
<p>The PSF can be approximated based on images of known scenes. The ALE source
distribution includes an experimental script that numerically approximates the
PSF in this way (<code>d2/render/psf/ale-psf-calibrate</code>). Other, more
efficient methods for approximating the PSF are likely possible, however.
<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>