<br>Hi Miki,<br><br>The Demons filter takes advantage of the fact that a <br>Gaussian smoothing is "equivalent" to a L2 regularization.<br><br>Where "equivalent" here means: "is close enough"<br>
<br>If you want to replace this norm, you will have to make<br>significant modifications to the code of the Demons <br>filter.<br><br>It will be interesting to see if you find a way of refactoring<br>the filter in such a way that different types of regularization<br>
can be used. That will be a great paper for the Insight <br>Journal (<a href="http://www.insight-journal.org">http://www.insight-journal.org</a>). :-)<br><br><br> Luis<br><br><br><br>----------------------------------------------------------------------<br>
<div class="gmail_quote">On Fri, Jun 11, 2010 at 4:55 AM, Miki Maric <span dir="ltr"><<a href="mailto:mikimaric1975@gmail.com">mikimaric1975@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Hello to all,<br><br>As I understand PDE implementation of Thirion Demons, Tikhonov type of regularizer is used (L2 norm).<br>Is there are possibility to implement other type of regularizer namely L1? <br><br>How to change smoother in this framework? (How to integrate Total Variation norm in it? Is it possible? Maybe by implementing itkTotalVariationDenoisingFilter instead of Gaussian?)<br>
<br><br>Thanks,<br><font color="#888888"><br>Miki<br><br><br><br>
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