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itkGradientImageFilter.h

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00001 /*=========================================================================
00002 
00003   Program:   Insight Segmentation & Registration Toolkit
00004   Module:    $RCSfile: itkGradientImageFilter.h,v $
00005   Language:  C++
00006   Date:      $Date: 2009-04-25 12:27:22 $
00007   Version:   $Revision: 1.20 $
00008 
00009   Copyright (c) Insight Software Consortium. All rights reserved.
00010   See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
00011 
00012      This software is distributed WITHOUT ANY WARRANTY; without even 
00013      the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
00014      PURPOSE.  See the above copyright notices for more information.
00015 
00016 =========================================================================*/
00017 #ifndef __itkGradientImageFilter_h
00018 #define __itkGradientImageFilter_h
00019 
00020 #include "itkImageToImageFilter.h"
00021 #include "itkImage.h"
00022 #include "itkCovariantVector.h"
00023 
00024 namespace itk
00025 {
00047 template <class TInputImage, class TOperatorValueType=float, class TOutputValueType=float>
00048 class ITK_EXPORT GradientImageFilter :
00049     public ImageToImageFilter< TInputImage,
00050                                Image<CovariantVector<TOutputValueType, ::itk::GetImageDimension<TInputImage>::ImageDimension>,  ::itk::GetImageDimension<TInputImage>::ImageDimension> >
00051 {
00052 public:
00054   itkStaticConstMacro(InputImageDimension, unsigned int,
00055                       TInputImage::ImageDimension);
00056   itkStaticConstMacro(OutputImageDimension, unsigned int,
00057                       TInputImage::ImageDimension);
00059 
00061   typedef GradientImageFilter Self;
00062 
00064   typedef TInputImage                       InputImageType;
00065   typedef typename InputImageType::Pointer  InputImagePointer;
00066   typedef Image<CovariantVector<
00067     TOutputValueType, itkGetStaticConstMacro(OutputImageDimension)>,
00068                 itkGetStaticConstMacro(OutputImageDimension)>
00069                                             OutputImageType;
00070   typedef typename OutputImageType::Pointer OutputImagePointer;
00072 
00074   typedef ImageToImageFilter< InputImageType, OutputImageType> Superclass;
00075   typedef SmartPointer<Self>                                   Pointer;
00076   typedef SmartPointer<const Self>                             ConstPointer;
00077 
00079   itkNewMacro(Self);
00080 
00082   itkTypeMacro(GradientImageFilter, ImageToImageFilter);
00083 
00085   typedef typename InputImageType::PixelType   InputPixelType;
00086   typedef TOperatorValueType                   OperatorValueType;
00087   typedef TOutputValueType                     OutputValueType;
00088   typedef CovariantVector<
00089     OutputValueType, itkGetStaticConstMacro(OutputImageDimension)>
00090                                                OutputPixelType;
00091   typedef typename OutputImageType::RegionType OutputImageRegionType;
00092 
00099   virtual void GenerateInputRequestedRegion() throw(InvalidRequestedRegionError);
00100 
00103   void SetUseImageSpacingOn()
00104     { this->SetUseImageSpacing(true); }
00105 
00108   void SetUseImageSpacingOff()
00109     { this->SetUseImageSpacing(false); }
00110 
00113   itkSetMacro(UseImageSpacing, bool);
00114   itkGetConstMacro(UseImageSpacing, bool);
00116 
00117 #ifdef ITK_USE_CONCEPT_CHECKING
00118 
00119   itkConceptMacro(InputConvertibleToOutputCheck,
00120     (Concept::Convertible<InputPixelType, OutputValueType>));
00121   itkConceptMacro(OutputHasNumericTraitsCheck,
00122     (Concept::HasNumericTraits<OutputValueType>));
00123 
00125 #endif
00126 
00139   itkSetMacro( UseImageDirection, bool );
00140   itkGetConstMacro( UseImageDirection, bool );
00141   itkBooleanMacro( UseImageDirection );
00143 
00144 protected:
00145   GradientImageFilter();
00146   virtual ~GradientImageFilter();
00147   void PrintSelf(std::ostream& os, Indent indent) const;
00148 
00159   void ThreadedGenerateData(const OutputImageRegionType& outputRegionForThread,
00160                             int threadId );
00161 
00162 private:
00163   GradientImageFilter(const Self&); //purposely not implemented
00164   void operator=(const Self&); //purposely not implemented
00165 
00166   bool m_UseImageSpacing;
00167 
00168   // flag to take or not the image direction into account
00169   // when computing the derivatives.
00170   bool m_UseImageDirection;
00171 
00172 };
00173   
00174 } // end namespace itk
00175 
00176 #ifndef ITK_MANUAL_INSTANTIATION
00177 #include "itkGradientImageFilter.txx"
00178 #endif
00179 
00180 #endif
00181 

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