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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: itkGridForwardWarpImageFilter.h
Language: C++
Date: $Date$
Version: $Revision$
Copyright (c) Insight Software Consortium. All rights reserved.
See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#ifndef __itkGridForwardWarpImageFilter_h
#define __itkGridForwardWarpImageFilter_h
#include "itkImageToImageFilter.h"
namespace itk
{
/** \class GridForwardWarpImageFilter
* \brief Warps a grid using an input deformation field.
*
* GridForwardWarpImageFilter warps a grid with respect to
* a given deformation field.
*
* A deformation field is represented as a image whose pixel type is some
* vector type with at least N elements, where N is the dimension of
* the input image. The vector type must support element access via operator
* [].
*
* The output image is produced by forward mapping.
*
* Each vector in the deformation field represent the distance between
* a geometric point in the input space and a point in the output space such
* that:
*
* \f[ p_{in} = p_{out} + d \f]
*
* Typically the mapped position does not correspond to an integer pixel
* position in the output image. We round it.
*
* \author Tom Vercauteren, INRIA & Mauna Kea Technologies
*
* This implementation was taken from the Insight Journal paper:
* http://hdl.handle.net/1926/510
*
*/
template <
class TDeformationField,
class TOutputImage
>
class ITK_EXPORT GridForwardWarpImageFilter :
public ImageToImageFilter<TDeformationField, TOutputImage>
{
public:
/** Standard class typedefs. */
typedef GridForwardWarpImageFilter Self;
typedef ImageToImageFilter<TDeformationField,TOutputImage> Superclass;
typedef SmartPointer<Self> Pointer;
typedef SmartPointer<const Self> ConstPointer;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** Run-time type information (and related methods) */
itkTypeMacro( GridForwardWarpImageFilter, ImageToImageFilter );
/** Typedef to describe the output image region type. */
typedef typename TOutputImage::RegionType OutputImageRegionType;
/** Inherit some types from the superclass. */
typedef typename Superclass::OutputImageType OutputImageType;
typedef typename Superclass::OutputImagePointer OutputImagePointer;
typedef typename OutputImageType::IndexType IndexType;
typedef typename OutputImageType::SizeType SizeType;
typedef typename OutputImageType::PixelType PixelType;
typedef typename OutputImageType::SpacingType SpacingType;
/** Determine the image dimension. */
itkStaticConstMacro(ImageDimension, unsigned int,
TOutputImage::ImageDimension );
itkStaticConstMacro(DeformationFieldDimension, unsigned int,
TDeformationField::ImageDimension );
/** Deformation field typedef support. */
typedef TDeformationField DeformationFieldType;
typedef typename DeformationFieldType::ConstPointer DeformationFieldConstPointer;
typedef typename DeformationFieldType::PixelType DisplacementType;
/** Set the background value */
itkSetMacro( BackgroundValue, PixelType );
/** Get the background value */
itkGetConstMacro( BackgroundValue, PixelType );
/** Set the foreground value */
itkSetMacro( ForegroundValue, PixelType );
/** Get the foreground value */
itkGetConstMacro( ForegroundValue, PixelType );
#ifdef ITK_USE_CONCEPT_CHECKING
/** Begin concept checking */
itkConceptMacro(SameDimensionCheck,
(Concept::SameDimension<ImageDimension, DeformationFieldDimension>));
itkConceptMacro(DeformationFieldHasNumericTraitsCheck,
(Concept::HasNumericTraits<typename TDeformationField::PixelType::ValueType>));
/** End concept checking */
#endif
protected:
GridForwardWarpImageFilter();
~GridForwardWarpImageFilter() {};
void PrintSelf(std::ostream& os, Indent indent) const;
/**
* GenerateData()
*/
void GenerateData();
private:
GridForwardWarpImageFilter(const Self&); //purposely not implemented
void operator=(const Self&); //purposely not implemented
PixelType m_BackgroundValue;
PixelType m_ForegroundValue;
unsigned int m_GridPixSpacing;
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkGridForwardWarpImageFilter.txx"
#endif
#endif
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