diff --git a/Modules/Numerics/Statistics/include/itkHistogram.hxx b/Modules/Numerics/Statistics/include/itkHistogram.hxx
index 625bebc0632..aafcf2107ac 100644
--- a/Modules/Numerics/Statistics/include/itkHistogram.hxx
+++ b/Modules/Numerics/Statistics/include/itkHistogram.hxx
@@ -176,8 +176,6 @@ Histogram<TMeasurement, TFrequencyContainer>::Initialize(const SizeType & size)
     this->m_OffsetTable[i + 1] = num;
   }
 
-  this->m_TempIndex.SetSize(this->GetMeasurementVectorSize());
-
   m_NumberOfInstances = num;
 
   // adjust the sizes of min max value containers
@@ -196,7 +194,10 @@ Histogram<TMeasurement, TFrequencyContainer>::Initialize(const SizeType & size)
 
   // initialize auxiliary variables
   this->m_TempIndex.SetSize(this->GetMeasurementVectorSize());
+  m_TempIndex.Fill(0);
+
   this->m_TempMeasurementVector.SetSize(this->GetMeasurementVectorSize());
+  m_TempMeasurementVector.Fill(0);
 
   // initialize the frequency container
   m_FrequencyContainer->Initialize(this->m_OffsetTable[this->GetMeasurementVectorSize()]);
@@ -701,8 +702,7 @@ Histogram<TMeasurement, TFrequencyContainer>::PrintSelf(std::ostream & os, Inden
     }
   }
 
-  os << indent << "TempMeasurementVector: "
-     << static_cast<typename NumericTraits<MeasurementVectorType>::PrintType>(m_TempMeasurementVector) << std::endl;
+  os << indent << "TempMeasurementVector: " << m_TempMeasurementVector << std::endl;
   os << indent << "TempIndex: " << static_cast<typename NumericTraits<IndexType>::PrintType>(m_TempIndex) << std::endl;
   os << indent << "ClipBinsAtEnds: " << (m_ClipBinsAtEnds ? "On" : "Off") << std::endl;
 }
diff --git a/Modules/Segmentation/LevelSets/include/itkParallelSparseFieldLevelSetImageFilter.h b/Modules/Segmentation/LevelSets/include/itkParallelSparseFieldLevelSetImageFilter.h
index 17748d6d397..9e5bcffd850 100644
--- a/Modules/Segmentation/LevelSets/include/itkParallelSparseFieldLevelSetImageFilter.h
+++ b/Modules/Segmentation/LevelSets/include/itkParallelSparseFieldLevelSetImageFilter.h
@@ -124,16 +124,16 @@ class ITK_TEMPLATE_EXPORT ParallelSparseFieldCityBlockNeighborList
   Print(std::ostream & os, Indent indent) const;
 
 private:
-  char                      m_Pad1[128];
-  unsigned int              m_Size;
-  RadiusType                m_Radius;
-  std::vector<unsigned int> m_ArrayIndex;
-  std::vector<OffsetType>   m_NeighborhoodOffset;
+  char                      m_Pad1[128]{};
+  unsigned int              m_Size{ 2 * Dimension };
+  RadiusType                m_Radius{};
+  std::vector<unsigned int> m_ArrayIndex{};
+  std::vector<OffsetType>   m_NeighborhoodOffset{};
 
   /** An internal table for keeping track of stride lengths in a neighborhood,
    *  i.e. the memory offsets between pixels along each dimensional axis. */
-  unsigned int m_StrideTable[Dimension];
-  char         m_Pad2[128];
+  unsigned int m_StrideTable[Dimension]{};
+  char         m_Pad2[128]{};
 };
 
 /**
diff --git a/Modules/Segmentation/LevelSets/include/itkParallelSparseFieldLevelSetImageFilter.hxx b/Modules/Segmentation/LevelSets/include/itkParallelSparseFieldLevelSetImageFilter.hxx
index 4f44d0a4a08..919d95258c2 100644
--- a/Modules/Segmentation/LevelSets/include/itkParallelSparseFieldLevelSetImageFilter.hxx
+++ b/Modules/Segmentation/LevelSets/include/itkParallelSparseFieldLevelSetImageFilter.hxx
@@ -49,7 +49,6 @@ ParallelSparseFieldCityBlockNeighborList<TNeighborhoodType>::ParallelSparseField
   NeighborhoodType it(m_Radius, dummy_image, dummy_image->GetRequestedRegion());
   nCenter = it.Size() / 2;
 
-  m_Size = 2 * Dimension;
   m_ArrayIndex.reserve(m_Size);
   m_NeighborhoodOffset.reserve(m_Size);
 
@@ -83,7 +82,7 @@ ParallelSparseFieldCityBlockNeighborList<TNeighborhoodType>::Print(std::ostream
 
   os << "ParallelSparseFieldCityBlockNeighborList: " << std::endl;
 
-  os << indent << "m_Pad1: " << m_Pad1 << std::endl;
+  os << indent << "Pad1: " << m_Pad1 << std::endl;
   os << indent << "Size: " << m_Size << std::endl;
   os << indent << "Radius: " << m_Radius << std::endl;
   os << indent << "ArrayIndex: " << m_ArrayIndex << std::endl;