[Insight-users] vtk-itk pipeline : Island removal.

[Luis Ibanez]

Hi Raghu,

Thanks for the additional details.

Unfortunately, as you pointed out, the Voting Filters
in ITK are implemented only for binary images.

You could imagine extending the same algorithm to multi-component
images (e.g. RGB) by defining a distance in that space. (e.g. a
distance between the values of two RGB triplets.).

Another option that you may want to explore is to use a
MedianImageFilter on each one of the RGB components of
your image. The Median filter is usually good at removing
salt-and-pepper noise, and when applied iteratively it can
remove structures of larger size.


A couple of questions:


1)  What is the size (in pixels) of the islands
     that you want to remove ?


2)  Is your RGB image the result of running a
     segmentation method ?



   Please let us know,


      Thanks


        Luis


--------------------
RAGHU PRASAD wrote:
> Respected Sir,
>  
> Thanks for the reply.Sir I  have a 3D volume rendered anatomical 
> structure that contains few residues/debris(unwanted structures ) which 
> has to be removed or filtered out every time the volume rendered image 
> is generated does ITK /VTK provide 3D island removal filters to remove 
> 3d structures from the input volume based image on their size,if so 
> please let me know under which section I can find 3D island removal 
> filter floaters in VTK/ITK.Does Itk has the facility to handle 3D color 
> Images .My Image is a 3D RGB Image with 512 x 512 Pixels.I tried voting 
> binary hole filling filter but it supports only binary images .Is there 
> any option to remove the salt and pepper effect in the 3D RGB images 
> with the help of voting filters.Please reply.
>  
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> Warm Regards
>  
> Raghu Prasad.M.S
>  
> Manipal University,Manipal