diff --git a/Modules/Segmentation/MarkovRandomFieldsClassifiers/include/itkMRFImageFilter.hxx b/Modules/Segmentation/MarkovRandomFieldsClassifiers/include/itkMRFImageFilter.hxx
index ebf93263c46..d83642e1a2d 100644
--- a/Modules/Segmentation/MarkovRandomFieldsClassifiers/include/itkMRFImageFilter.hxx
+++ b/Modules/Segmentation/MarkovRandomFieldsClassifiers/include/itkMRFImageFilter.hxx
@@ -346,14 +346,8 @@ MRFImageFilter<TInputImage, TClassifiedImage>::Allocate()
   m_LabelStatusImage->SetBufferedRegion(region);
   m_LabelStatusImage->Allocate();
 
-  LabelStatusImageIterator rIter(m_LabelStatusImage, m_LabelStatusImage->GetBufferedRegion());
-
   // Initialize the label status image to 1
-  while (!rIter.IsAtEnd())
-  {
-    rIter.Set(1);
-    ++rIter;
-  }
+  m_LabelStatusImage->FillBuffer(1);
 }
 
 template <typename TInputImage, typename TClassifiedImage>
diff --git a/Modules/Segmentation/MarkovRandomFieldsClassifiers/include/itkRGBGibbsPriorFilter.hxx b/Modules/Segmentation/MarkovRandomFieldsClassifiers/include/itkRGBGibbsPriorFilter.hxx
index 567ba0eaca7..5506832f592 100644
--- a/Modules/Segmentation/MarkovRandomFieldsClassifiers/include/itkRGBGibbsPriorFilter.hxx
+++ b/Modules/Segmentation/MarkovRandomFieldsClassifiers/include/itkRGBGibbsPriorFilter.hxx
@@ -288,8 +288,6 @@ template <typename TInputImage, typename TClassifiedImage>
 double
 RGBGibbsPriorFilter<TInputImage, TClassifiedImage>::GibbsEnergy(unsigned int i, unsigned int k, unsigned int k1)
 {
-  LabelledImageRegionIterator labelledImageIt(m_LabelledImage, m_LabelledImage->GetBufferedRegion());
-
   LabelType    f[8];
   unsigned int neighborcount = 0;
   int          simnum = 0;