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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Dear all,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>It is my first post on the list and perhaps my question has already been answered previously, albeit I couldn’t find where. I’d be glad if you could help even with a link.<o:p></o:p></p><p class=MsoNormal>I’m implementing a filter similar to the one found in Examples\Iterators\ShapedNeighborhoodIterators1.cxx<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>[1] I understand that the advantage of the NeighborhoodAlgorithm::ImageBoundaryFacesCalculator is to lighten the burden of the algorithm where no check for bounds is necessary.<o:p></o:p></p><p class=MsoNormal>However in the (inner) loop of the ShapedNeighborhoodIterator, no bounds are checked; instead all neighbors are visited (even those falling outside of the image).<o:p></o:p></p><p class=MsoNormal>How can I check for this?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>[2] In the (inner) loop of the ShapedNeighborhoodIterator, I can get the values of the pixels with ci.Get() .<o:p></o:p></p><p class=MsoNormal>How can I get the indexes? The GetIndex method does not work.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thank you for your time,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Hugues<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Here is my code:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> <span style='color:blue'>typedef</span> itk::ShapedNeighborhoodIterator< ImageType > ShapedNeighborhoodIteratorType;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> ShapedNeighborhoodIteratorType::OffsetType top = {{<span style='color:#FF8000'>0</span>,-<span style='color:#FF8000'>1</span>}};<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> ShapedNeighborhoodIteratorType::OffsetType bottom = {{<span style='color:#FF8000'>0</span>,<span style='color:#FF8000'>1</span>}};<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> ShapedNeighborhoodIteratorType::OffsetType left = {{-<span style='color:#FF8000'>1</span>,<span style='color:#FF8000'>0</span>}};<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> ShapedNeighborhoodIteratorType::OffsetType right = {{<span style='color:#FF8000'>1</span>,<span style='color:#FF8000'>0</span>}};<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> ShapedNeighborhoodIteratorType::RadiusType radius;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> radius.Fill( <span style='color:#FF8000'>1</span> );<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> <span style='color:blue'>typedef</span> itk::NeighborhoodAlgorithm::ImageBoundaryFacesCalculator< ImageType > FaceCalculatorType;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> FaceCalculatorType faceCalculator;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> FaceCalculatorType::FaceListType faceList;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> FaceCalculatorType::FaceListType::iterator faceListIterator;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> faceList = faceCalculator( inputImage, inputImage->GetRequestedRegion(), radius );<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> <span style='color:blue'>for</span> ( faceListIterator=faceList.begin(); faceListIterator != faceList.end(); ++faceListIterator)<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> {<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> std::cout << <span style='color:#A31515'>"Face group"</span> << std::endl;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> ShapedNeighborhoodIteratorType it( radius, reader->GetOutput(), *faceListIterator );<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> <span style='color:blue'>for</span> (it.GoToBegin(); !it.IsAtEnd(); ++it)<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> {<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> std::cout << <span style='color:#A31515'>"Centre index: "</span> << it.GetIndex() << std::endl;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> it.ActivateOffset(top);<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> it.ActivateOffset(bottom);<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> it.ActivateOffset(left);<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> it.ActivateOffset(right);<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> ShapedNeighborhoodIteratorType::ConstIterator ci;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> std::cout << <span style='color:#A31515'>" Neighbor values: "</span>;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> <span style='color:blue'>for</span> (ci = it.Begin(); ci != it.End(); ci++)<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> {<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> std::cout << ci.Get() << <span style='color:#A31515'>" "</span>; <span style='color:#00B050'>// All neighbors visited?!?, How to GetIndex() ?!?</span><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> }<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> std::cout << std::endl;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> }<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'> }</span><o:p></o:p></p></div></body></html>