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<title>All Filter Forge Filters By Nebukadnezar</title>
<description></description> 
<link>http://www.filterforge.com/filters/author12204-page1.html</link>
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<webMaster>support@filterforge.com</webMaster> 
<copyright>(C) 2013</copyright>
<pubDate>Tue, 21 May 2013 15:16:46 -0400</pubDate> 
<lastBuildDate>Tue, 21 May 2013 15:16:46 -0400</lastBuildDate>
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<title>Polar to cartesian and back</title><link>http://www.filterforge.com/filters/10577.html</link>
<dc:creator>Nebukadnezar</dc:creator><category>10577</category><pubDate>Fri, 27 Apr 2012 00:00:00 EDT</pubDate><guid>http://www.filterforge.com/filters/10577.html</guid>
<description>&lt;a href=&quot;http://www.filterforge.com/filters/10577.html&quot;&gt;&lt;img src=&quot;http://www.filterforge.com/filters/10577-small.jpg&quot; border=&quot;0&quot; height=&quot;120&quot; width=&quot;120&quot;&gt;&lt;/a&gt;&lt;br&gt;&lt;small&gt;April 27, 2012&lt;/small&gt;&lt;p&gt;This snippet will convert a square image from supposed  polar coordinates to cartesian/rectangular and then back, without loosing parts of the original image.
This can be useful, for example,  if you want to apply a strictly linear component like smudge in a radial manner.  
You convert to cartesian, apply the linear transformation of your choice and then apply polar coordinates once more. 
A solution for non square images is possible, in theory, if the aspect ratio is known. 

Based on filters by uberzev and byRo.

I added some Color Controls as comments.
You can change them to your hearts desire,  but they do nothing.&lt;/p&gt;</description>
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