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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkImageTransformHelper.h,v $
Language: C++
Date: $Date: 2008-01-27 04:40:13 $
Version: $Revision: 1.9 $
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 __itkImageTransformHelper_h
#define __itkImageTransformHelper_h
#include "itkConceptChecking.h"
#include "itkPoint.h"
#include "itkMatrix.h"
namespace itk
{
/** \class ImageTransformHelper
* \brief Fast index/physical index computation
*/
template <unsigned int NImageDimension, unsigned int R, unsigned int C>
class ImageTransformHelper
{
public:
typedef ImageBase<NImageDimension> ImageType;
typedef typename ImageType::IndexType IndexType;
typedef typename ImageType::SpacingType SpacingType;
typedef Matrix<double, NImageDimension, NImageDimension> MatrixType;
typedef typename ImageType::PointType OriginType;
typedef Point<double, NImageDimension> DoublePoint;
typedef Point<float, NImageDimension> FloatPoint;
typedef Concept::Detail::UniqueType_bool<false> UniqueTypeBoolFalse;
typedef Concept::Detail::UniqueType_bool<true> UniqueTypeBoolTrue;
// IndexToPhysicalPoint with full matrix
//
//
inline static void TransformIndexToPhysicalPoint(
const MatrixType & matrix, const OriginType & origin,
const IndexType & index, DoublePoint & point)
{
ImageTransformHelper<NImageDimension, R, C>::
TransformIndexToPhysicalPointRow(
matrix, origin,
index, point,
Concept::Detail::UniqueType_bool<(R+1==0)>());
}
inline static void TransformIndexToPhysicalPointRow(
const MatrixType & matrix, const OriginType & origin,
const IndexType & index, DoublePoint & point,
const UniqueTypeBoolFalse& )
{
point[R] = origin[R];
// Start column
ImageTransformHelper<NImageDimension,R,C>
::TransformIndexToPhysicalPointCol(
matrix,
index,point,
Concept::Detail::UniqueType_bool<(C+1==0)>());
// Do Next Row
ImageTransformHelper<NImageDimension,R-1,C>
::TransformIndexToPhysicalPointRow(
matrix,origin,
index,point,
Concept::Detail::UniqueType_bool<(R==0)>());
}
inline static void TransformIndexToPhysicalPointRow(
const MatrixType &, const OriginType &,
const IndexType &, DoublePoint &,
const UniqueTypeBoolTrue& )
{
// Do last row
}
inline static void TransformIndexToPhysicalPointCol(
const MatrixType & matrix,
const IndexType & index, DoublePoint & point,
const UniqueTypeBoolFalse& )
{
point[R] = point[R] + matrix[R][C]*index[C];
// Do next dimension
ImageTransformHelper<NImageDimension,R,C-1>
::TransformIndexToPhysicalPointCol(
matrix,
index,point,
Concept::Detail::UniqueType_bool<(C==0)>());
}
inline static void TransformIndexToPhysicalPointCol(
const MatrixType &,
const IndexType &, DoublePoint &,
const UniqueTypeBoolTrue& )
{
}
// PhysicalPointToIndex with full matrix
//
//
inline static void TransformPhysicalPointToIndex(
const MatrixType & matrix, const OriginType & origin,
const DoublePoint & point, IndexType & index)
{
DoublePoint rindex;
ImageTransformHelper<NImageDimension, R, C>::
TransformPhysicalPointToIndexRow(
matrix, origin,
point, rindex, index,
Concept::Detail::UniqueType_bool<(R+1==0)>());
}
inline static void TransformPhysicalPointToIndexRow(
const MatrixType & matrix, const OriginType & origin,
const DoublePoint & point, DoublePoint & rindex, IndexType & index,
const UniqueTypeBoolFalse& )
{
rindex[R] = 0.0;
// Start column
ImageTransformHelper<NImageDimension,R,C>
::TransformPhysicalPointToIndexCol(
matrix,origin,
point,rindex,index,
Concept::Detail::UniqueType_bool<(C+1==0)>());
// Do next row
ImageTransformHelper<NImageDimension,R-1,C>
::TransformPhysicalPointToIndexRow(
matrix,origin,
point,rindex,index,
Concept::Detail::UniqueType_bool<(R==0)>());
}
inline static void TransformPhysicalPointToIndexRow(
const MatrixType &, const OriginType &,
const DoublePoint &, DoublePoint &, IndexType &,
const UniqueTypeBoolTrue& )
{
// Do last row
}
inline static void TransformPhysicalPointToIndexCol(
const MatrixType & matrix, const OriginType & origin,
const DoublePoint & point, DoublePoint & rindex, IndexType & index,
const UniqueTypeBoolFalse& )
{
rindex[R] = rindex[R] + matrix[R][C]*(point[C] - origin[C]);
// Do next dimension
ImageTransformHelper<NImageDimension,R,C-1>
::TransformPhysicalPointToIndexCol(
matrix,origin,
point,rindex,index,
Concept::Detail::UniqueType_bool<(C==0)>());
}
inline static void TransformPhysicalPointToIndexCol(
const MatrixType &, const OriginType &,
const DoublePoint &, DoublePoint &rindex, IndexType &index,
const UniqueTypeBoolTrue& )
{
index[R] = static_cast<typename IndexType::IndexValueType>(rindex[R]);
}
};
} // end namespace itk
#endif
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