[Insight-users] Problems using itk::VectorFuzzyConnectednessImageFilter

[Ying Zhuge]

I will check and let you know soon. Thanks!

Ying

Christian Bauer wrote:

>Hi!
>
>I have problems using the itk::VectorFuzzyConnectednessImageFilter. I'm
>currently using itk 1.8.
>
>I wrote the following code and noticed three problems:
>1) There's no method SetObjects for setting the number of objects as explained
>at the end of Detailed Description of the class; there's a method
>SetNumberOfObjects instead.
>2) There's no method SetSelectedObject as explained in the documentation. I
>wasn't able to find another appropriate method.
>3) When i try to set the properties of the different objects i'm just able to
>set the mean and variance of all object. But when i try to set the seed for the
>second object a segmentation violation occurs - i'm just able to set the seed
>for the first object. I also tried to add another seed to the first object.
>There's no problem with that.
>
>typedef itk::Vector< signed short, 1 > PixelType;
>typedef itk::Image< PixelType, 2 > ImageType;
>typedef unsigned char BinaryPixelType;
>typedef itk::Image< BinaryPixelType, 2 > BinaryImageType;
>
>typedef itk::ImageFileReader< ImageType > ReaderType;
>ReaderType::Pointer reader = ReaderType::New();
>reader->SetFileName( argv[1] );
>ImageType::Pointer scene = reader->GetOutput();
>scene->Update();
>
>int numberOfObjects = 3;
>int objectOfInterest = 1;
>
>std::vector< ImageType::IndexType > seed;
>std::vector< itk::Vector<double, 1> > mean;
>std::vector< itk::Matrix<double, 1, 1> > variance;
>
>... init of seed, mean and variance
>
>typedef itk::VectorFuzzyConnectednessImageFilter< ImageType, BinaryImageType >  
>FuzzySegmentationFilterType;
>  FuzzySegmentationFilterType::Pointer fuzzysegmenter =
>FuzzySegmentationFilterType::New();
>
>fuzzysegmenter->SetInput( scene );
>fuzzysegmenter->SetNumberOfObjects( numberOfObjects );
>//fuzzysegmenter->SetSelectedObject( objectOfInterest );
>for (int i=0; i<numberOfObjects; i++)
>  {
>  fuzzysegmenter->SetObjectsMean( mean[i], i );
>  fuzzysegmenter->SetObjectsMatrix( variance[i], i );
>  fuzzysegmenter->SetObjectsSeed( seed[i], i );
>  }
>
>fuzzysegmenter->Update();
>
>Any suggestions?  Thanks in advance...
>
>Christian
>
>
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