itkHoughTransform2DLinesImageFilter.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 __itkHoughTransform2DLinesImageFilter_h
#define __itkHoughTransform2DLinesImageFilter_h


#include "itkImageToImageFilter.h"
#include "itkLineSpatialObject.h"

namespace itk
{
template< typename TInputPixelType, typename TOutputPixelType >
class HoughTransform2DLinesImageFilter:
  public ImageToImageFilter< Image< TInputPixelType, 2 >, Image< TOutputPixelType, 2 > >
{
public:

  typedef HoughTransform2DLinesImageFilter Self;

  typedef Image< TInputPixelType, 2 >           InputImageType;
  typedef typename InputImageType::Pointer      InputImagePointer;
  typedef typename InputImageType::ConstPointer InputImageConstPointer;

  typedef Image< TOutputPixelType, 2 >      OutputImageType;
  typedef typename OutputImageType::Pointer OutputImagePointer;

  typedef SmartPointer< Self >       Pointer;
  typedef SmartPointer< const Self > ConstPointer;

  typedef LineSpatialObject< 2 >     LineType;
  typedef typename LineType::Pointer LinePointer;
  typedef std::list< LinePointer >   LinesListType;
  typedef LineType::LinePointType    LinePointType;

  typedef typename LinesListType::size_type LinesListSizeType;

  typedef ImageToImageFilter< InputImageType, OutputImageType > Superclass;

  typedef typename InputImageType::IndexType IndexType;

  typedef typename InputImageType::PixelType PixelType;

  typedef typename InputImageType::RegionType OutputImageRegionType;

  itkTypeMacro(HoughTransform2DLinesImageFilter, ImageToImageFilter);

  itkNewMacro(Self);

  void GenerateData();

  itkSetMacro(Threshold, float);

  itkGetConstMacro(Threshold, float);

  itkSetMacro(AngleResolution, float);

  itkGetConstMacro(AngleResolution, float);

  void Simplify(void);

  itkGetModifiableObjectMacro(SimplifyAccumulator, OutputImageType);

  LinesListType & GetLines(unsigned int n = 0);

  itkSetMacro(NumberOfLines, unsigned int);
  itkGetConstMacro(NumberOfLines, unsigned int);

  itkSetMacro(DiscRadius, float);
  itkGetConstMacro(DiscRadius, float);

  itkSetMacro(Variance, float);
  itkGetConstMacro(Variance, float);

#ifdef ITK_USE_CONCEPT_CHECKING
  // Begin concept checking
  itkConceptMacro( IntConvertibleToOutputCheck,
                   ( Concept::Convertible< int, TOutputPixelType > ) );
  itkConceptMacro( InputGreaterThanFloatCheck,
                   ( Concept::GreaterThanComparable< PixelType, float > ) );
  itkConceptMacro( OutputPlusIntCheck,
                   ( Concept::AdditiveOperators< TOutputPixelType, int > ) );
  // End concept checking
#endif

protected:

  HoughTransform2DLinesImageFilter();
  virtual ~HoughTransform2DLinesImageFilter() {}

  void PrintSelf(std::ostream & os, Indent indent) const;

  void GenerateInputRequestedRegion();

  void GenerateOutputInformation();

  void EnlargeOutputRequestedRegion(DataObject *output);

private:

  HoughTransform2DLinesImageFilter(const Self &);
  void operator=(const Self &);

  float              m_AngleResolution;
  float              m_Threshold;
  OutputImagePointer m_SimplifyAccumulator;
  LinesListType      m_LinesList;
  LinesListSizeType  m_NumberOfLines;
  float              m_DiscRadius;
  float              m_Variance;
  ModifiedTimeType   m_OldModifiedTime;
  LinesListSizeType  m_OldNumberOfLines;
};
} // end namespace itk

#ifndef ITK_MANUAL_INSTANTIATION
#include "itkHoughTransform2DLinesImageFilter.hxx"
#endif

#endif