[Insight-users] ITK + VTK + 3D TIFFs

[Gib Bogle]

Meantime I've been figuring out how to use itkConnectedComponentImageFilter, the 
idea being to find all the objects then remove those below a threshold size. 
I'm getting strange results with my small test image.

The image is binary, 437x430.  Initially (using pixel type unsigned char) I got 
the error message about too many objects, so I changed the type to unsigned 
short.  The number of found objects is 838.  The image is basically white, with 
black spots, some of which enclose white regions (these are what I want to 
remove).  I'm finding that some of these enclosed "objects" are missed.  There 
are four with more than 100 pixels (excluding the white background), and only 
two are identified as objects.

Do I have wrong expectations of itkConnectedComponentImageFilter?

Thanks
Gib

On 25/04/2011 4:42 p.m., Bill Lorensen wrote:
> You could use one of itk's voting filters:
> itkLabelVotingImageFIlter
> itkVotingBinaryHoleFillingImageFilter
> itkVotingBinaryIterativeHoleFillingImageFilter
>
>
> On Sun, Apr 24, 2011 at 9:28 PM, Gib Bogle <g.bogle at auckland.ac.nz
> <mailto:g.bogle at auckland.ac.nz>> wrote:
>
>     I'm not sure if this should be here or on the VTK message list, so I'm
>     posting it to both lists.
>
>     I'm processing 3D TIFFs with ITK, but I want to use the island removal
>     capability of VTK, to filter each 2D image in the 3D stack (as far as I can
>     see VTK doesn't know about 3D TIFFs).  I presume I need to open the 3D image
>     in ITK, select a 2D slice, convert it to VTK 2D image format, apply the
>     island removal filter, convert it back to ITK image format, and write it
>     back into the 3D image.  It would be very nice if someone has done something
>     similar to this and could show me how to do it.
>
>     Thanks
>     Gib
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