[Insight-developers] VoronoiSegmentationImageFilter

Mon, 21 Oct 2002 12:26:11 -0400

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I am having problems getting the VoronoiSegmentation filter to produce any output.  

  itk::VoronoiSegmentationImageFilter<FloatImage, FloatImage>::Pointer
    voronoi=itk::VoronoiSegmentationImageFilter<FloatImage, FloatImage>::New();
  voronoi->SetInput( original->GetOutput() );
  voronoi->SetNumberOfSeeds( 100 );
  voronoi->SetOutputBoundary( false );
  voronoi->SetSteps( 500 );
  voronoi->TakeAPrior( masker->GetOutput() );
  voronoi->SetMeanPercentError(0.1);
  voronoi->SetVarPercentError(1);
  voronoi->Update();

The filter churns for a while but the output image is blank.

(I have toggled the OutputBoundary flag but I get a  blank image).

In terms of architecture, the prior image (used in TakeAPrior) is not one of the filter inputs, so
the filter does operate properly in the pipeline.

Jim Miller 
_____________________________________
Visualization & Computer Vision
GE Research
Bldg. KW, Room C218B
P.O. Box 8, Schenectady NY 12301

millerjv@research.ge.com <mailto:millerjv@research.ge.com> 

james.miller@research.ge.com
(518) 387-4005, Dial Comm: 8*833-4005, 
Cell: (518) 505-7065, Fax: (518) 387-6981 

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<DIV>I am having problems getting 
the VoronoiSegmentation filter to produce any output.&nbsp; </DIV>
<DIV class=Section1>
&nbsp; 
itk::VoronoiSegmentationImageFilter&lt;FloatImage, 
FloatImage&gt;::Pointer &nbsp;&nbsp;&nbsp; 
voronoi=itk::VoronoiSegmentationImageFilter&lt;FloatImage, 
FloatImage&gt;::New(); &nbsp; voronoi-&gt;SetInput( original-&gt;GetOutput() 
); &nbsp; voronoi-&gt;SetNumberOfSeeds( 100 ); &nbsp; 
voronoi-&gt;SetOutputBoundary( false ); &nbsp; voronoi-&gt;SetSteps( 500 
); &nbsp; voronoi-&gt;TakeAPrior( masker-&gt;GetOutput() ); &nbsp; 
voronoi-&gt;SetMeanPercentError(0.1); &nbsp; 
voronoi-&gt;SetVarPercentError(1); &nbsp; 
voronoi-&gt;Update(); &nbsp;
The filter churns 
for a while but the output image is blank.
(I have toggled 
the OutputBoundary flag but I get a&nbsp; blank image).
In terms of 
architecture, the prior image (used in TakeAPrior) is not one of the filter 
inputs, so the filter does operate properly in the pipeline.
Jim Miller 
 _____________________________________ Visualization &amp; 
Computer Vision GE 
Research Bldg. KW, Room C218B P.O. Box 8, Schenectady NY 
12301 <A 
href="mailto:millerjv@research.ge.com">millerjv@research.ge.com</A>
james.miller@research.ge.com (518) 387-4005, Dial 
Comm: 8*833-4005, Cell: (518) 505-7065, 
Fax: (518) 387-6981 
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