Hi Sila,<br><br>What kind of curvature are you looking for ?<br><br>Is it the Gauss curvature of an Iso-surface of intensity ?<br><br>Is your input image an image of grayscale values ?<br><br>--<br><br>You will find methods for computing curvature in the file:<br>
<br> Insight/Code/Common/itkLevelSetFunction.txx<br><br>In:<br><ul><li>ComputeMinimalCurvature() line 55, and</li><li>ComputeMeanCurvature() line 160.</li></ul><br>Regards,<br><br><br> Luis<br><br><br>-------------------------------------------------<br>
<div class="gmail_quote">On Fri, Aug 14, 2009 at 8:21 AM, Sıla Girgin <span dir="ltr"><<a href="mailto:silagirgin@gmail.com">silagirgin@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;">
Hi,<br><br>I am trying to calculate curvature value for each pixel in an image. <br>I could not find a function in ITK.<br>I used RecursiveGaussianImageFilter to find first and second derivatives. Then I put them in to this formula<br>
<br>k = (x'y'' - y'x'') / (x'2 + y'2)3/2<br><br>but, results are not good.. <br>Do you have a function to calculate curvature by using ITK functions?<br>Or do you have any suggestion?<br><br>
Thanks <br><br>Sila Girgin<br>
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