If you look at the source for Curves3DExtraction, you will find that it uses the itk::HessianRecursiveGaussianImageFilter and the itk::HessianToLaplacianFunction. The application allows you to play around in eigen space to extract structures from DSA, lung CT scans etc. The motivation being that you can discern tubular, plate like and spherical structures from the relationship that the eigen values of the hessian have. See notes on
<a href="http://public.kitware.com/Insight/Doxygen/html/classitk_1_1Hessian3DToVesselnessMeasureImageFilter.html">http://public.kitware.com/Insight/Doxygen/html/classitk_1_1Hessian3DToVesselnessMeasureImageFilter.html</a>
<br><br>Once you can find a culling frustum using Curves3DExtractor to extract structures in your image, I'd suggest you take a look at the Frangi filter (from InsightJournal) and Sato (itk::Hessian3DToVesselnessMeasureImageFilter int ITK) to do a better job of extraction.
<br><br>HTH<br>--<br>karthik<br><br><div><span class="gmail_quote">On 1/10/08, <b class="gmail_sendername">rashedk</b> <<a href="mailto:rashed.vtk@googlemail.com">rashed.vtk@googlemail.com</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<br>Hi there,<br><br>I am interested in finding ridges in intensity (for vessel detection). In<br>order to do this I need to compute the Hessian. I couldn't a function or<br>filter in ITK which computes the Hessian (although Curves3DExtraction
<br>somehow does it). Is there any?<br><br>Thanks in advance,<br><br>Rashed.<br><br><br>--<br>View this message in context: <a href="http://www.nabble.com/How-to-compute-the-Hessian--tp14747997p14747997.html">http://www.nabble.com/How-to-compute-the-Hessian--tp14747997p14747997.html
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