<div dir="ltr"><span style="font-family:arial,sans-serif;font-size:13px">LabelContourImageFilter constructs an RGB image with a contour, if i understood correctly. so not quite what I am looking for (just boundary voxels with label id's ). </span><br>
<div><span style="font-family:arial,sans-serif;font-size:13px"><br></span></div><div><span style="font-family:arial,sans-serif;font-size:13px">Best,</span></div><div><span style="font-family:arial,sans-serif;font-size:13px">Martijn </span></div>
</div><div class="gmail_extra"><br><br><div class="gmail_quote">On Tue, Feb 25, 2014 at 4:38 PM, Dženan Zukić <span dir="ltr"><<a href="mailto:dzenanz@gmail.com" target="_blank">dzenanz@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small">I suggested that as a way to compute the required contour while being unaware that such a filter, probably computationally fairly efficient, already exists.</div>


</div><div class="HOEnZb"><div class="h5"><div class="gmail_extra"><br><br><div class="gmail_quote">On Tue, Feb 25, 2014 at 4:35 PM, Martijn Steenwijk <span dir="ltr"><<a href="mailto:martijnsteenwijk@gmail.com" target="_blank">martijnsteenwijk@gmail.com</a>></span> wrote:<br>


<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Sorry for the late response. I refer to a contour (so in fact what the LabelContourImageFilter is highlighting), not a bounding box. I appreciate the suggestion of using a distance map; however, that would be quite computation intensitive for images in which I have a few thousand labels? <div>



<br></div><div>Best,</div><div>Martijn </div></div><div><div><div class="gmail_extra"><br><br><div class="gmail_quote">On Tue, Feb 25, 2014 at 1:32 PM, Bill Lorensen <span dir="ltr"><<a href="mailto:bill.lorensen@gmail.com" target="_blank">bill.lorensen@gmail.com</a>></span> wrote:<br>



<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">And here is an example:<br>
<a href="http://itk.org/Wiki/ITK/Examples/ImageSegmentation/LabelContourImageFilter" target="_blank">http://itk.org/Wiki/ITK/Examples/ImageSegmentation/LabelContourImageFilter</a><br>
<br>
Bill<br>
<div><div><br>
<br>
On Tue, Feb 25, 2014 at 7:15 AM, Nicholas Tustison <<a href="mailto:ntustison@gmail.com" target="_blank">ntustison@gmail.com</a>> wrote:<br>
> Perhaps this is what is needed:<br>
><br>
> <a href="http://www.itk.org/Doxygen/html/classitk_1_1LabelContourImageFilter.html" target="_blank">http://www.itk.org/Doxygen/html/classitk_1_1LabelContourImageFilter.html</a><br>
><br>
><br>
><br>
> On Feb 25, 2014, at 7:02 AM, Dženan Zukić <<a href="mailto:dzenanz@gmail.com" target="_blank">dzenanz@gmail.com</a>> wrote:<br>
><br>
> I believe he is referring to contours of labels.<br>
><br>
> Maybe you can calculate distance map, and then zero out the pixels/voxels<br>
> which are more than 1 pixel away from the boundaries?<br>
><br>
><br>
> On Mon, Feb 24, 2014 at 2:46 PM, Bradley Lowekamp <<a href="mailto:blowekamp@mail.nih.gov" target="_blank">blowekamp@mail.nih.gov</a>><br>
> wrote:<br>
>><br>
>> Hello,<br>
>><br>
>> What do you mean by boundaries? An axis aligned bounding box? A oriented<br>
>> bounding box? Or A contour of label?<br>
>><br>
>> Brad<br>
>><br>
>> On Feb 24, 2014, at 7:44 AM, Martijn Steenwijk<br>
>> <<a href="mailto:martijnsteenwijk@gmail.com" target="_blank">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<br>
>> > a set of labels (preserving label id's), in order to compute some statistics<br>
>> > at the label boundaries, for example with itkLabelStatisticsImageFilter?<br>
>> ><br>
>> > Thanks for ideas in advance,<br>
>> > Martijn<br>
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