<html><head><meta http-equiv="Content-Type" content="text/html charset=iso-8859-1"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">Interesting. Have you considered looking at the ratio of a gaussian and a laplacian at certain scales to detect the feature you are interested in?<div><br></div><div>Brad<br><div><br></div><div>Brad</div><div><div><div>On Oct 7, 2014, at 10:06 AM, Jerry <<a href="mailto:65104355@qq.com">65104355@qq.com</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"><div><p>I am developing a segmentation algorithm that requires detect tube and ball typed airways in CT image. I tried canny, log, hessian etc. None of them looks promising. Any advice will be appreicated.</p><p>Regards,</p><p>Jerry</p><p><span><B3AB03A0@8E359815.59F33354.jpg></span></p></div><span><B3AB03A0@8E359815.59F33354.jpg></span><span><tubecircle.jpg></span>_____________________________________<br>Powered by <a href="http://www.kitware.com">www.kitware.com</a><br><br>Visit other Kitware open-source projects at<br><a href="http://www.kitware.com/opensource/opensource.html">http://www.kitware.com/opensource/opensource.html</a><br><br>Kitware offers ITK Training Courses, for more information visit:<br>http://www.kitware.com/products/protraining.php<br><br>Please keep messages on-topic and check the ITK FAQ at:<br>http://www.itk.org/Wiki/ITK_FAQ<br><br>Follow this link to subscribe/unsubscribe:<br>http://public.kitware.com/mailman/listinfo/insight-users<br>_______________________________________________<br>Community mailing list<br>Community@itk.org<br>http://public.kitware.com/mailman/listinfo/community<br></blockquote></div><br></div></div></body></html>