input volume -> output parameter

[David Gobbi]

Hi All,

Has anyone built a VTK classes which will input one or more image volumes,
and output a single value?  I'm interested in classes that will e.g.

1) input a single volume, and have a GetCentroid() method to return
   the centroid of the volume (or more generally, a GetNthMoment() 
   method to return the 0th, 1st, etc. moment of the image)

2) input two images, and have a GetMutualInformation() or GetCorrelation()
   method to specify how well the volumes match each other, for use in
   image registration algorithms

It would be nice if there was a base class for classes like these, which
would handle the multithreading etc.  Like a vtkImageToImageFilter with
an Execute method (to calculate parameters from the image) but no output.  

 - David

--
  David Gobbi, MSc                    dgobbi at irus.rri.on.ca
  Advanced Imaging Research Group
  Robarts Research Institute, University of Western Ontario

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