[ITK] Computing/Getting the attributes of ShapeLabelObject

[Zein Salah]

Hi,

I want to compute some shape properties  of segmented objects in a binary image.
S I used the code below to create a labelmap.  BTW, I am using ITK 3.14.

   typedef unsigned long LabelType;
   typedef itk::ShapeLabelObject< LabelType, 3 > LabelObjectType;
   typedef itk::LabelMap< LabelObjectType > LabelMapType;

   typedef itk::BinaryImageToShapeLabelMapFilter< OverlayImageType,
LabelMapType > ConverterType;
   ConverterType::Pointer converter = ConverterType::New();
   converter->SetInput(m_SegmentedImage);
   converter->SetInputForegroundValue(255);
   converter->Update();

   LabelMapType::Pointer labelMap = converter->GetOutput();

   for( unsigned int label=0; label <
labelMap->GetNumberOfLabelObjects(); label++ )
   {
       const LabelObjectType * labelObject = labelMap->GetNthLabelObject(label);
       LabelObjectType::CentroidType centroid = labelObject->GetCentroid();
       std::cout << label << ": " << labelObject->GetCentroid() << "   "
                                  << labelObject->GetPhysicalSize() << "   "
                                  << labelObject->GetRegionElongation() << "   "
                                  << labelObject->GeRoundness()
                                  << std::endl;
   }


Strangely, the output of the Roundness is always 0. Moreover, it seems that
some attrubutes are not implemented, e.g. GetElongation,
GetboundingBox. From the
corresponding IJ paper, I could not really understand if the the
attributes are computed
or need to computed elsewhere.

Any hints how this should work?

Thanks,
Zein