text: /*=========================================================================
   *
   *  Copyright Insight Software Consortium
   *
   *  Licensed under the Apache License, Version 2.0 (the "License");
   *  you may not use this file except in compliance with the License.
   *  You may obtain a copy of the License at
   *
   *         http://www.apache.org/licenses/LICENSE-2.0.txt
   *
   *  Unless required by applicable law or agreed to in writing, software
   *  distributed under the License is distributed on an "AS IS" BASIS,
   *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   *  See the License for the specific language governing permissions and
   *  limitations under the License.
   *
   *=========================================================================*/
  #ifndef __itkBasicErodeImageFilter_hxx
  #define __itkBasicErodeImageFilter_hxx
  
  #include "itkBasicErodeImageFilter.h"
  
  namespace itk
  {
  template< class TInputImage, class TOutputImage, class TKernel >
  BasicErodeImageFilter< TInputImage, TOutputImage, TKernel >
  ::BasicErodeImageFilter()
  {
    m_ErodeBoundaryCondition.SetConstant( NumericTraits< PixelType >::max() );
    this->OverrideBoundaryCondition(&m_ErodeBoundaryCondition);
  }
  
  template< class TInputImage, class TOutputImage, class TKernel >
  typename BasicErodeImageFilter< TInputImage, TOutputImage, TKernel >::PixelType
  BasicErodeImageFilter< TInputImage, TOutputImage, TKernel >
  ::Evaluate(const NeighborhoodIteratorType & nit,
             const KernelIteratorType kernelBegin,
             const KernelIteratorType kernelEnd)
  {
    unsigned int i;
    PixelType    min = NumericTraits< PixelType >::max();
    PixelType    temp;
  
    KernelIteratorType kernel_it;
  
    for ( i = 0, kernel_it = kernelBegin; kernel_it < kernelEnd; ++kernel_it, ++i )
      {
      // if structuring element is positive, use the pixel under that element
      // in the image
      if ( *kernel_it > NumericTraits< KernelPixelType >::Zero )
        {
        // note we use GetPixel() on the NeighborhoodIterator in order
        // to respect boundary conditions.
        temp = nit.GetPixel(i);
  
        if ( temp < min )
          {
          min = temp;
          }
        }
      }
  
    return min;
  }
  } // end namespace itk
  #endif
  