<br><br>Hi Superzz<br><br>A) Do you need to mark the pixels of the object boundary ?<br><br>or<br><br>B) Do you need to find locations of points in the boundary ?<br><div class="gmail_quote"><br><br>If what you need is (A) then you could use the <br>
CannyEdgeDetection filter.<br><a href="http://www.itk.org/Doxygen/html/classitk_1_1CannyEdgeDetectionImageFilter.html">http://www.itk.org/Doxygen/html/classitk_1_1CannyEdgeDetectionImageFilter.html</a><br><br>See the example in <br>
<br>Insight/Examples/Filtering/CannyEdgeDetectionImageFilter.cxx<br><br><br>If what you need is (B) you may want to consider <br>Model-to-Image registration as described in the<br>example:<br><br>Insight/Examples/Registration/<br>
ModelToImageRegistration1.cxx<br> ModelToImageRegistration2.cxx<br><br><br> Regards,<br><br><br> Luis<br><br><br>-------------------------------------------------------------------------------<br>
On Sat, Apr 24, 2010 at 12:48 AM, superzz <span dir="ltr"><<a href="mailto:jxdw_zlf@yahoo.com.cn">jxdw_zlf@yahoo.com.cn</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;">
<br>
Hello<br>
I have an approximate round object in picture. I can use hough circle to<br>
determine the circle object center and radius. The hough circle result is<br>
its approximate boundary. I want to use hough circle result as inital<br>
result, and use some algorithm to obtain the exact boundary. What algorithm<br>
I should use?<br>
<br>
Thanks<br>
<br>
superZZ<br>
--<br>
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