[Insight-users] Constrained region growing

[Mathias Seitel]

Hi Radhika,

as far as I know there is no such filter. However you can use the 
itk::RegionOfInterestImageFilter to extract a region from an image and 
then apply your region growing filter to this new image. The 
RegionOfInterestImageFilter sets its origin such that the new and the 
original images are aligned properly, i.e. you can for example easily 
superimpose the result on the original image. That's how I do it.

One disadvantage of this method is the additional memory which is needed 
by the ROI filter.

Mathias


Radhika Sivaramakrishna wrote:

> Hi there,
> Is there a method to do constrained region growing?
> Ie. Where you can specify a boundary and when the region growing 
> algorithm reaches the boundary, it stops growing no matter what (ie even 
> if pixels immediately outside this boundary are eligible to be aggregated).
> 
> Thanks
> Radhika
> 
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-- 
Dipl.-Inf. (FH) Mathias Seitel
Fraunhofer Gesellschaft         Phone: +49-6151-155 484
Institute for Computer Graphics Fax: +49-6151-155 559
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