<div dir="ltr"><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small">I believe he is referring to contours of labels.</div><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small">

<br></div><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small">Maybe you can <a href="http://www.itk.org/Doxygen/html/classitk_1_1SignedMaurerDistanceMapImageFilter.html">calculate distance map</a>, and then zero out the pixels/voxels which are more than 1 pixel away from the boundaries?</div>

</div><div class="gmail_extra"><br><br><div class="gmail_quote">On Mon, Feb 24, 2014 at 2:46 PM, Bradley Lowekamp <span dir="ltr"><<a href="mailto:blowekamp@mail.nih.gov" target="_blank">blowekamp@mail.nih.gov</a>></span> wrote:<br>

<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hello,<br>
<br>
What do you mean by boundaries? An axis aligned bounding box? A oriented bounding box? Or A contour of label?<br>
<br>
Brad<br>
<div><div class="h5"><br>
On Feb 24, 2014, at 7:44 AM, Martijn Steenwijk <<a href="mailto:martijnsteenwijk@gmail.com">martijnsteenwijk@gmail.com</a>> wrote:<br>
<br>
> Hi all,<br>
><br>
> Is there any way to easily obtain the (inner and/or outer) boundaries of a set of labels (preserving label id's), in order to compute some statistics at the label boundaries, for example with itkLabelStatisticsImageFilter?<br>


><br>
> Thanks for ideas in advance,<br>
> Martijn<br>
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