[Insight-users] Get label boundaries

Tue Feb 25 10:56:03 EST 2014

Ok, didn't knew that. I'll look at it. thanks :)

On Tue, Feb 25, 2014 at 4:51 PM, Nicholas Tustison <ntustison at gmail.com>wrote:

> No, it doesn’t create an RGB image.  I use it all the time
> and it works great.
>
>
> On Feb 25, 2014, at 10:40 AM, Martijn Steenwijk <
> martijnsteenwijk at gmail.com> wrote:
>
> 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 ).
>
> Best,
> Martijn
>
>
> On Tue, Feb 25, 2014 at 4:38 PM, Dženan Zukić <dzenanz at gmail.com> wrote:
>
>> I suggested that as a way to compute the required contour while being
>> unaware that such a filter, probably computationally fairly efficient,
>> already exists.
>>
>>
>> On Tue, Feb 25, 2014 at 4:35 PM, Martijn Steenwijk <
>> martijnsteenwijk at gmail.com> wrote:
>>
>>> 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?
>>>
>>> Best,
>>> Martijn
>>>
>>>
>>> On Tue, Feb 25, 2014 at 1:32 PM, Bill Lorensen <bill.lorensen at gmail.com>wrote:
>>>
>>>> And here is an example:
>>>>
>>>> http://itk.org/Wiki/ITK/Examples/ImageSegmentation/LabelContourImageFilter
>>>>
>>>> Bill
>>>>
>>>>
>>>> On Tue, Feb 25, 2014 at 7:15 AM, Nicholas Tustison <ntustison at gmail.com>
>>>> wrote:
>>>> > Perhaps this is what is needed:
>>>> >
>>>> >
>>>> http://www.itk.org/Doxygen/html/classitk_1_1LabelContourImageFilter.html
>>>> >
>>>> >
>>>> >
>>>> > On Feb 25, 2014, at 7:02 AM, Dženan Zukić <dzenanz at gmail.com> wrote:
>>>> >
>>>> > I believe he is referring to contours of labels.
>>>> >
>>>> > Maybe you can calculate distance map, and then zero out the
>>>> pixels/voxels
>>>> > which are more than 1 pixel away from the boundaries?
>>>> >
>>>> >
>>>> > On Mon, Feb 24, 2014 at 2:46 PM, Bradley Lowekamp <
>>>> blowekamp at mail.nih.gov>
>>>> > wrote:
>>>> >>
>>>> >> Hello,
>>>> >>
>>>> >> What do you mean by boundaries? An axis aligned bounding box? A
>>>> oriented
>>>> >> bounding box? Or A contour of label?
>>>> >>
>>>> >> Brad
>>>> >>
>>>> >> On Feb 24, 2014, at 7:44 AM, Martijn Steenwijk
>>>> >> <martijnsteenwijk at gmail.com> wrote:
>>>> >>
>>>> >> > Hi all,
>>>> >> >
>>>> >> > 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?
>>>> >> >
>>>> >> > Thanks for ideas in advance,
>>>> >> > Martijn
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>>>
>>>
>>> _____________________________________
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>>
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