[Insight-users] Object Labeling - Attribute representing neighborhood

[Luis Ibanez]

Hi Christian,

Thanks for the detailed description of what you are trying to  do.


I'm wondering if the following class is what you are looking for:

                    itkLabelContourImageFilter.txx

http://public.kitware.com/Insight/Doxygen/html/classitk_1_1LabelContourImageFilter.html
"Labels the pixels on the border of the objects in a labeled image. "


    Regards,


            Luis


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On Tue, Apr 6, 2010 at 6:52 AM, Christian Werner
<christian.werner at rwth-aachen.de> wrote:
> Hello!
>
> I am currently working with Gaetens Object Labeling/Measuring. It really
> does a good job and I am glad that it seemlessly integrates into my
> software. Now that I have analyzed how I could improve my object evalution,
> I was looking for a way to qualify the neighborhood of an object. It seems
> that this is a very characteristic trait of every ROI. Looking at all
> pixels/voxels contained in the bounding box and e.g. take their average
> would already give a rough estimate. Objects that e.g. differ in the
> variance in the values of their neighboring elements could be easily
> distinguished, even if all other attributes would suggest that they are of
> the same type (roundness, size, ...). At least this is what I could need for
> my analyzing purposes.
>
> Despite of the "simple" solution of the boundnig box I thought of several
> ways to realize this. One could for example dilate all objects to a certain
> degree, then subtract the original object to obtain a thick layer
> surrounding the object. This layer would be an object itself and you could
> just go ahead and qualify this layer as any other object. But this would
> mean that you have to somehow make a correspodance between all layers and
> all objects that they belong to. Assuming that the labeling itself is
> already consistent (layers will get same IDs as the object), everything
> would just be fine, but I doubt that you can trust that this is always the
> case.
>
> Maybe there is already another way to qualify the neighborhood? I didn't get
> to find such funcionality when looking through the paper.
>
> Best regards,
> Christian
>
>
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