<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;">Hello,<div><br></div><div>I think a Grayscale dilate and then a threshold may do what you want, if you use a cross with a radius one. The dilate with take the maximum over this template.</div><div><br></div><div>Hope that helps.</div><div>Brad</div><div><br><div><div>On May 15, 2014, at 11:45 AM, Mirco Serra <<a href="mailto:mirco9091@hotmail.it">mirco9091@hotmail.it</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div class="hmmessage" style="font-size: 12pt; font-family: Calibri; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><div dir="ltr">Hi guys,<div><br></div><div>I have a 2D gray-scale image and I need to locate all the sets of 4-connected voxels that have an intensity below a certain threshold. Do you know which method may be the best in order to do so?</div><div><br></div><div>Many thanks in advance for your help,</div><div>Mirco</div></div>_____________________________________<br>Powered by<span class="Apple-converted-space"> </span><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><a href="http://www.kitware.com/products/protraining.php">http://www.kitware.com/products/protraining.php</a><br><br>Please keep messages on-topic and check the ITK FAQ at:<br><a href="http://www.itk.org/Wiki/ITK_FAQ">http://www.itk.org/Wiki/ITK_FAQ</a><br><br>Follow this link to subscribe/unsubscribe:<br><a href="http://www.itk.org/mailman/listinfo/insight-users">http://www.itk.org/mailman/listinfo/insight-users</a></div></blockquote></div><br></div></body></html>