itkMaskedFFTNormalizedCorrelationImageFilter.h

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/*=========================================================================
 *
 *  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 __itkMaskedFFTNormalizedCorrelationImageFilter_h
#define __itkMaskedFFTNormalizedCorrelationImageFilter_h

#include "itkImageToImageFilter.h"
#include "itkImage.h"

namespace itk
{

template <class TInputImage, class TOutputImage >
class ITK_EXPORT MaskedFFTNormalizedCorrelationImageFilter :
    public ImageToImageFilter< TInputImage, TOutputImage >
{
public:
  typedef MaskedFFTNormalizedCorrelationImageFilter                     Self;
  typedef ImageToImageFilter < TInputImage, TOutputImage >              Superclass;
  typedef SmartPointer<Self>                                            Pointer;
  typedef SmartPointer<const Self>                                      ConstPointer;

  itkNewMacro(Self);

  itkTypeMacro(MaskedFFTNormalizedCorrelationImageFilter, MaskedFFTNormalizedCrossCorrelationImageFilter);

  itkStaticConstMacro(ImageDimension, unsigned int,
                      TOutputImage::ImageDimension);

  typedef TInputImage                               InputImageType;
  typedef TOutputImage                              OutputImageType;
  typedef typename InputImageType::RegionType       InputRegionType;
  typedef typename InputImageType::Pointer          InputImagePointer;
  typedef typename InputImageType::ConstPointer     InputImageConstPointer;
  typedef typename InputImageType::SizeType         InputSizeType;
  typedef typename OutputImageType::Pointer         OutputImagePointer;
  typedef typename OutputImageType::PixelType       OutputPixelType;

  typedef OutputPixelType                           RealPixelType;
  typedef Image< RealPixelType, ImageDimension>     RealImageType;
  typedef typename RealImageType::Pointer           RealImagePointer;
  typedef typename RealImageType::IndexType         RealIndexType;
  typedef typename RealImageType::SizeType          RealSizeType;
  typedef typename RealImageType::RegionType        RealRegionType;

  typedef Image< std::complex<RealPixelType>, ImageDimension >  FFTImageType;
  typedef typename FFTImageType::Pointer                        FFTImagePointer;

  void SetFixedImage(InputImageType *input)
    {
      this->SetNthInput(0, const_cast<InputImageType *>(input) );
    }
  InputImageType * GetFixedImage()
    {
      return static_cast<InputImageType*>(const_cast<DataObject *>(this->ProcessObject::GetInput(0)));
    }

  void SetMovingImage(InputImageType *input)
    {
      this->SetNthInput(1, const_cast<InputImageType *>(input) );
    }
  InputImageType * GetMovingImage()
    {
      return static_cast<InputImageType*>(const_cast<DataObject *>(this->ProcessObject::GetInput(1)));
    }

  void SetFixedImageMask(InputImageType *input)
    {
      this->SetNthInput(2, const_cast<InputImageType *>(input) );
    }
  InputImageType * GetFixedImageMask()
    {
      return static_cast<InputImageType*>(const_cast<DataObject *>(this->ProcessObject::GetInput(2)));
    }

  void SetMovingImageMask(InputImageType *input)
    {
      this->SetNthInput(3, const_cast<InputImageType *>(input) );
    }
  InputImageType * GetMovingImageMask()
    {
      return static_cast<InputImageType*>(const_cast<DataObject *>(this->ProcessObject::GetInput(3)));
    }

  itkSetMacro(RequiredNumberOfOverlappingVoxels,unsigned long);
  itkGetMacro(RequiredNumberOfOverlappingVoxels,unsigned long);

#ifdef ITK_USE_CONCEPT_CHECKING

  itkConceptMacro( OutputPixelTypeIsFloatingPointCheck,
                   ( Concept::IsFloatingPoint< OutputPixelType > ) );

#endif

protected:
  MaskedFFTNormalizedCorrelationImageFilter()
  {
    this->SetNumberOfRequiredInputs(2);
    m_RequiredNumberOfOverlappingVoxels = 0;
  }
  virtual ~MaskedFFTNormalizedCorrelationImageFilter() {}
  void PrintSelf(std::ostream& os, Indent indent) const;

  void VerifyInputInformation();

  void GenerateData();

  virtual void GenerateInputRequestedRegion();

  void GenerateOutputInformation();

  template< class LocalInputImageType >
  typename LocalInputImageType::Pointer PreProcessMask( const LocalInputImageType * inputImage, const LocalInputImageType * inputMask );

  template< class LocalInputImageType >
  typename LocalInputImageType::Pointer PreProcessImage( const LocalInputImageType * inputImage, LocalInputImageType * inputMask );

  typename TInputImage::Pointer RotateImage( InputImageType * inputImage );

  template< class LocalInputImageType, class LocalOutputImageType >
  typename LocalOutputImageType::Pointer CalculateForwardFFT( LocalInputImageType * inputImage, InputSizeType & FFTImageSize );

  template< class LocalInputImageType, class LocalOutputImageType >
  typename LocalOutputImageType::Pointer CalculateInverseFFT( LocalInputImageType * inputImage, RealSizeType & combinedImageSize );

  // Helper math methods.
  template< class LocalInputImageType, class LocalOutputImageType >
  typename LocalOutputImageType::Pointer ElementProduct( LocalInputImageType * inputImage1, LocalInputImageType * inputImage2 );

  template< class LocalInputImageType >
  typename LocalInputImageType::Pointer ElementQuotient( LocalInputImageType * inputImage1, LocalInputImageType * inputImage2 );

  template< class LocalInputImageType >
  typename LocalInputImageType::Pointer ElementSubtraction( LocalInputImageType * inputImage1, LocalInputImageType * inputImage2 );

  template< class LocalInputImageType >
  typename LocalInputImageType::Pointer ElementPositive( LocalInputImageType * inputImage );

  template< class LocalInputImageType, class LocalOutputImageType >
  typename LocalOutputImageType::Pointer ElementRound( LocalInputImageType * inputImage );

  // This function factorizes the image size uses factors of 2, 3, and
  // 5.  After this factorization, if there are any remaining values,
  // the function returns this value.
  int FactorizeNumber( int n );

  // Find the closest valid dimension above the desired dimension.  This
  // will be a combination of 2s, 3s, and 5s.
  int FindClosestValidDimension( int n );

  template< class LocalInputImageType >
  double CalculatePrecisionTolerance( LocalInputImageType * inputImage );

private:
  MaskedFFTNormalizedCorrelationImageFilter(const Self&); //purposely not implemented
  void operator=(const Self&); //purposely not implemented

  unsigned long m_RequiredNumberOfOverlappingVoxels;
};
} // end namespace itk

#ifndef ITK_MANUAL_INSTANTIATION
#include "itkMaskedFFTNormalizedCorrelationImageFilter.hxx"
#endif

#endif