[Insight-users] Problems with Sobel filter

[doege at mi.fu-berlin.de]

Hello,

I am kind of helpless, I am trying to implement a sobel filter and  
getting the following error messages:
I already tried to cast manual but this doesn´t work either. Some how  
I need to cast the image(dicom) but I don´t know where and how, can  
anyone give me some adwise?
-------------------------------
WARNING: In  
c:\insighttoolkit-3.8.0\source\code\basicfilters\itkSobelEdgeDetectionImageFilter.txx, line  
95
SobelEdgeDetectionImageFilter (06D6A7F0): Output pixel type MUST be  
float or double to prevent computational errors

-------------------------------
template < typename TPixel, unsigned int VImageDimension >
void RegionGrowing( itk::Image<TPixel, VImageDimension>* itkImage,  
Step6* step6 )
{

	typedef float InternalPixelType;
	typedef itk::Image< InternalPixelType, VImageDimension > InternalImageType;

    typedef itk::Image< TPixel, VImageDimension > InputImageType;  //  
Image type
    typedef itk::Image< TPixel, VImageDimension > OutputImageType;
    OutputImageType::Pointer output;
    typedef typename InputImageType::IndexType    IndexType;
//Sobel
  	typedef itk::SobelEdgeDetectionImageFilter< InputImageType,  
OutputImageType > SobelFilterType;

     try
     {

         // Apply Sobel Filter
         SobelFilterType::Pointer sobelFilter = SobelFilterType::New();
         //sobelFilter->SetInput( filter->GetOutput() );
	sobelFilter->SetInput((itkImage));
	//sobelFilter->Update();

         // Write output image
	//output->static_cast<itk::Image<TPixel,  
VImageDimension>*>(sobelFilter->GetOutput());

	// add output of AutomaticSegmentation to tree
          mitk::DataTreePreOrderIterator it(step6->m_Tree);
         step6->m_ResultNode =  
mitk::DataTreeHelper::AddItkImageToDataTree((sobelFilter->GetOutput()), &it,  
"segmentation");

     	step6->m_ResultImage =  
static_cast<mitk::Image*>(step6->m_ResultNode->GetData());


     }
     catch (itk::ExceptionObject & err)
     {
         std::cout << "ExceptionObject caught !" << std::endl;
         std::cout << err << std::endl;
         return;
    }

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