[vtkusers] Decimating contour lines

[Frederic Perez]

> is there an algorithm that can decimate contour lines ?
> We are generating contour lines from high-resolution images
> and the poly-line count gets too high.

I used once vtkSmoothPolyDataFilter for the same problem. Some code:

  vtkSmoothPolyDataFilter* smoothPol = vtkSmoothPolyDataFilter::New();
  smoothPol->SetInput( connect->GetOutput() );
  //smoothPol->SetConvergence( 10. );
  smoothPol->SetNumberOfIterations( 50 );
  smoothPol->SetRelaxationFactor( 0.125 );
  //smoothPol->SetFeatureAngle( 75.0 );
  smoothPol->Update();

In addition, depending on your application, maybe you can smooth the
high resolution images before generating the contour lines.

Cheers,

Frederic Perez