X-Git-Url: https://git.creatis.insa-lyon.fr/pubgit/?a=blobdiff_plain;f=lib%2Ffpa%2FFilters%2FImage%2FSeedsFromLabelsInterface.hxx;fp=lib%2Ffpa%2FFilters%2FImage%2FSeedsFromLabelsInterface.hxx;h=8f58ba439b42e8030cd66891302e1d4cf9e1874c;hb=bd89a1af0c14ed2ac0afeca923103de54283cbaf;hp=0000000000000000000000000000000000000000;hpb=a8ac405fe1422bc0792a810f7f0693096a22c20e;p=FrontAlgorithms.git

diff --git a/lib/fpa/Filters/Image/SeedsFromLabelsInterface.hxx b/lib/fpa/Filters/Image/SeedsFromLabelsInterface.hxx
new file mode 100644
index 0000000..8f58ba4
--- /dev/null
+++ b/lib/fpa/Filters/Image/SeedsFromLabelsInterface.hxx
@@ -0,0 +1,84 @@
+// =========================================================================
+// @author Leonardo Florez Valencia
+// @email florez-l@javeriana.edu.co
+// =========================================================================
+#ifndef __fpa__Filters__Image__SeedsFromLabelsInterface__hxx__
+#define __fpa__Filters__Image__SeedsFromLabelsInterface__hxx__
+
+#include <itkImage.h>
+#include <itkImageRegionConstIteratorWithIndex.h>
+
+// -------------------------------------------------------------------------
+template< class _TTraits >
+fpa::Filters::Image::SeedsFromLabelsInterface< _TTraits >::
+SeedsFromLabelsInterface( itk::ProcessObject* f )
+  : Superclass( f )
+{
+}
+
+// -------------------------------------------------------------------------
+template< class _TTraits >
+fpa::Filters::Image::SeedsFromLabelsInterface< _TTraits >::
+~SeedsFromLabelsInterface( )
+{
+}
+
+// -------------------------------------------------------------------------
+template< class _TTraits >
+void fpa::Filters::Image::SeedsFromLabelsInterface< _TTraits >::
+_PrepareSeeds( const itk::DataObject* reference )
+{
+  // Input object is a labelled image?
+  typedef typename _TTraits::TMark _TMark;
+  typedef itk::Image< _TMark, _TTraits::Dimension > _TLabelImage;
+  const _TLabelImage* labels =
+    dynamic_cast< const _TLabelImage* >( reference );
+  if( labels != NULL )
+  {
+    this->m_UnifiedSeeds.clear( );
+
+    // Iterate over labels
+    typedef itk::ImageRegionConstIteratorWithIndex< _TLabelImage > _TIt;
+    typename _TLabelImage::RegionType reg = labels->GetRequestedRegion( );
+    _TIt lIt( labels, reg );
+    for( lIt.GoToBegin( ); !lIt.IsAtEnd( ); ++lIt )
+    {
+      if( lIt.Get( ) > 0 )
+      {
+        bool is_seed = false;
+        for( unsigned int d = 0; d < _TTraits::Dimension; ++d )
+        {
+          for( int s = -1; s <= 1; s += 2 )
+          {
+            TVertex neigh = lIt.GetIndex( );
+            neigh[ d ] += s;
+            if( reg.IsInside( neigh ) )
+              is_seed |= ( labels->GetPixel( neigh ) == 0 );
+
+          } // rof
+
+        } // rof
+
+        // Add pixel as seed or already marked
+        TNode node;
+        node.Vertex = lIt.GetIndex( );
+        node.Parent = lIt.GetIndex( );
+        node.FrontId = lIt.Get( );
+        node.Value = TOutputValue( 0 );
+        if( !is_seed )
+        {
+          this->_AssignOutputValue( node );
+          this->_Mark( node );
+        }
+        else
+          this->m_UnifiedSeeds.insert( node );
+
+      } // fi
+
+    } // rof
+
+  } // fi
+}
+
+#endif // __fpa__Filters__Image__SeedsFromLabelsInterface__hxx__
+// eof - $RCSfile$