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 itkUnsharpMaskImageFilter_hxx
  #define itkUnsharpMaskImageFilter_hxx
  
  #include "itkUnsharpMaskImageFilter.h"
  #include "itkBinaryGeneratorImageFilter.h"
  #include "itkNumericTraits.h"
  #include "itkProgressAccumulator.h"
  
  namespace itk
  {
  
  template< typename TInputImage, typename TOutputImage, typename TInternalPrecision >
  UnsharpMaskImageFilter< TInputImage, TOutputImage, TInternalPrecision >
  ::UnsharpMaskImageFilter()
    :m_Amount(0.5),
    m_Threshold(0),
    m_Clamp(NumericTraits<OutputPixelType>::IsInteger)
    // clamping is on for integral types, and off for floating types
    // this gives intuitive behavior for integral types
    // and skips min/max checks for floating types
  {
    m_Sigmas.Fill(1.0);
  }
  
  template< typename TInputImage, typename TOutputImage, typename TInternalPrecision >
  void
  UnsharpMaskImageFilter< TInputImage, TOutputImage, TInternalPrecision >
  ::GenerateInputRequestedRegion()
  {
    // call the superclass' implementation of this method. this should
    // copy the output requested region to the input requested region
    Superclass::GenerateInputRequestedRegion();
  
    // This filter needs all of the input
    InputImagePointer image = const_cast<InputImageType *>(this->GetInput());
    if ( image )
      {
      image->SetRequestedRegion(this->GetInput()->GetLargestPossibleRegion());
      }
  }
  
  
  template< typename TInputImage, typename TOutputImage, typename TInternalPrecision >
  void
  UnsharpMaskImageFilter< TInputImage, TOutputImage, TInternalPrecision >
  ::VerifyPreconditions() ITKv5_CONST
  {
    Superclass::VerifyPreconditions();
    if (m_Threshold < 0.0)
      {
      itkExceptionMacro(<< "Threshold must be non-negative!");
      }
  }
  
  
  template< typename TInputImage, typename TOutputImage, typename TInternalPrecision >
  void
  UnsharpMaskImageFilter< TInputImage, TOutputImage, TInternalPrecision >
  ::GenerateData()
  {
    typename TInputImage::Pointer input = TInputImage::New();
    input->Graft(const_cast<TInputImage *>(this->GetInput()));
    typename GaussianType::Pointer gaussianF = GaussianType::New();
    gaussianF->SetInput(input);
    gaussianF->SetSigmaArray(m_Sigmas);
    gaussianF->SetNumberOfWorkUnits(this->GetNumberOfWorkUnits());
  
    using USMType = UnsharpMaskingFunctor< InputPixelType,
                                           TInternalPrecision,
                                           OutputPixelType >;
    using BinaryFunctorType = BinaryGeneratorImageFilter< TInputImage,
                                                          typename GaussianType::OutputImageType,
                                                          TOutputImage >;
    typename BinaryFunctorType::Pointer functorF = BinaryFunctorType::New();
    functorF->SetInput1(this->GetInput());
    functorF->SetInput2(gaussianF->GetOutput());
    USMType usmT(m_Amount, m_Threshold, m_Clamp);
    functorF->SetFunctor(usmT);
    functorF->SetNumberOfWorkUnits(this->GetNumberOfWorkUnits());
  
    ProgressAccumulator::Pointer progress = ProgressAccumulator::New();
    progress->SetMiniPipelineFilter(this);
    progress->RegisterInternalFilter(gaussianF, 0.7);
    progress->RegisterInternalFilter(functorF, 0.3);
  
    functorF->GraftOutput(this->GetOutput());
    functorF->Update();
    this->GraftOutput(functorF->GetOutput());
  }
  
  
  template< typename TInputImage, typename TOutputImage, typename TInternalPrecision >
  void
  UnsharpMaskImageFilter< TInputImage, TOutputImage, TInternalPrecision >
  ::PrintSelf(std::ostream & os, Indent indent) const
  {
    Superclass::PrintSelf(os, indent);
    os << indent << "Sigmas: " << m_Sigmas << std::endl;
    os << indent << "Amount: " << m_Amount << std::endl;
    os << indent << "Threshold: " << m_Threshold << std::endl;
    os << indent << "Clamp: " << m_Clamp << std::endl;
  }
  
  } // end namespace itk
  
  #endif
  