It seems to me, <br>after seeing that image, my first thought is that some filtering based on fourier analysis might help.<br>At least when dealing with 2D images.<br><br>Regards<br><br><div class="gmail_quote">On Tue, Apr 27, 2010 at 9:27 PM, somi <span dir="ltr"><<a href="mailto:seesomi@gmail.com">seesomi@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">Hi,<br>I have some CT images which are severely degraded by ring artifacts during acquisition .<br>
The ring artifact looks something like : <a href="http://www.upstate.edu/radiology/rsna/ct/images/artifact4.jpg" target="_blank">http://www.upstate.edu/radiology/rsna/ct/images/artifact4.jpg</a> (not my image) , its more severe in my images.<br>
<br>Has anybody encountered similar artifacts ? Is there is any out of the box way to remove them ? <br><br>Regards,<br><font color="#888888">Somi<br>
</font><br>_____________________________________<br>
Powered by <a href="http://www.kitware.com" target="_blank">www.kitware.com</a><br>
<br>
Visit other Kitware open-source projects at<br>
<a href="http://www.kitware.com/opensource/opensource.html" target="_blank">http://www.kitware.com/opensource/opensource.html</a><br>
<br>
Kitware offers ITK Training Courses, for more information visit:<br>
<a href="http://www.kitware.com/products/protraining.html" target="_blank">http://www.kitware.com/products/protraining.html</a><br>
<br>
Please keep messages on-topic and check the ITK FAQ at:<br>
<a href="http://www.itk.org/Wiki/ITK_FAQ" target="_blank">http://www.itk.org/Wiki/ITK_FAQ</a><br>
<br>
Follow this link to subscribe/unsubscribe:<br>
<a href="http://www.itk.org/mailman/listinfo/insight-users" target="_blank">http://www.itk.org/mailman/listinfo/insight-users</a><br>
<br></blockquote></div><br><br clear="all"><br>-- <br>Sergio Vera<br><br> Alma IT Systems<br> C/ Vilana, 4B, 4º 1ª<br> 08022 Barcelona<br> T. (+34) 932 380 592<br> <a href="http://www.alma3d.com">www.alma3d.com</a><br>