/usr/include/InsightToolkit/Common/itkVectorInterpolateImageFunction.h is in libinsighttoolkit3-dev 3.20.1-1.
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Program: Insight Segmentation & Registration Toolkit
Module: itkVectorInterpolateImageFunction.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 __itkVectorInterpolateImageFunction_h
#define __itkVectorInterpolateImageFunction_h
#include "itkImageFunction.h"
#include "itkFixedArray.h"
namespace itk
{
/**
* Due to a bug in MSVC, an enum value cannot be accessed out of a template
* parameter until the template class opens. In order for templated classes
* to access the dimension of a template parameter in defining their
* own dimension, this class is needed as a work-around.
*/
template <typename T>
struct GetDimension
{
itkStaticConstMacro(Dimension, int, T::Dimension);
};
/** \class VectorInterpolateImageFunction
* \brief Base class for all vector image interpolaters.
*
* VectorInterpolateImageFunction is the base for all ImageFunctions that
* interpolates image with vector pixel types. This function outputs
* a return value of type Vector<double,Dimension>.
*
* This class is templated input image type and the coordinate
* representation type.
*
* \warning This hierarchy of functions work only for images
* with Vector-based pixel types. For scalar images use
* InterpolateImageFunction.
*
* \sa InterpolateImageFunction
* \ingroup ImageFunctions ImageInterpolators
*/
template <class TInputImage, class TCoordRep = double>
class ITK_EXPORT VectorInterpolateImageFunction :
public ImageFunction<
TInputImage,
ITK_TYPENAME NumericTraits<typename TInputImage::PixelType>::RealType,
TCoordRep >
{
public:
/** Extract the vector dimension from the pixel template parameter. */
itkStaticConstMacro(Dimension, unsigned int,
TInputImage::PixelType::Dimension);
/** Dimension underlying input image. */
itkStaticConstMacro(ImageDimension, unsigned int,
TInputImage::ImageDimension);
/** Standard class typedefs. */
typedef VectorInterpolateImageFunction Self;
typedef ImageFunction<TInputImage,
ITK_TYPENAME NumericTraits<typename TInputImage::PixelType>::RealType,
TCoordRep > Superclass;
typedef SmartPointer<Self> Pointer;
typedef SmartPointer<const Self> ConstPointer;
/** Run-time type information (and related methods). */
itkTypeMacro(VectorInterpolateImageFunction, ImageFunction);
/** InputImageType typedef support. */
typedef typename Superclass::InputImageType InputImageType;
typedef typename InputImageType::PixelType PixelType;
typedef typename PixelType::ValueType ValueType;
typedef typename NumericTraits<ValueType>::RealType RealType;
/** Point typedef support. */
typedef typename Superclass::PointType PointType;
/** Index typedef support. */
typedef typename Superclass::IndexType IndexType;
typedef typename Superclass::IndexValueType IndexValueType;
/** ContinuousIndex typedef support. */
typedef typename Superclass::ContinuousIndexType ContinuousIndexType;
/** Output type is RealType of TInputImage::PixelType. */
typedef typename Superclass::OutputType OutputType;
/** CoordRep typedef support. */
typedef TCoordRep CoordRepType;
/** Returns the interpolated image intensity at a
* specified point position. No bounds checking is done.
* The point is assume to lie within the image buffer.
* ImageFunction::IsInsideBuffer() can be used to check bounds before
* calling the method. */
virtual OutputType Evaluate( const PointType& point ) const
{
ContinuousIndexType index;
this->GetInputImage()->TransformPhysicalPointToContinuousIndex( point, index );
return ( this->EvaluateAtContinuousIndex( index ) );
}
/** Interpolate the image at a continuous index position
*
* Returns the interpolated image intensity at a
* specified index position. No bounds checking is done.
* The point is assume to lie within the image buffer.
*
* Subclasses must override this method.
*
* ImageFunction::IsInsideBuffer() can be used to check bounds before
* calling the method. */
virtual OutputType EvaluateAtContinuousIndex(
const ContinuousIndexType & index ) const = 0;
/** Interpolate the image at an index position.
* Simply returns the image value at the
* specified index position. No bounds checking is done.
* The point is assume to lie within the image buffer.
*
* ImageFunction::IsInsideBuffer() can be used to check bounds before
* calling the method. */
virtual OutputType EvaluateAtIndex( const IndexType & index ) const
{
OutputType output;
PixelType input = this->GetInputImage()->GetPixel( index );
for( unsigned int k = 0; k < Dimension; k++ )
{
output[k] = static_cast<double>( input[k] );
}
return ( output );
}
protected:
VectorInterpolateImageFunction() {}
~VectorInterpolateImageFunction() {}
void PrintSelf(std::ostream& os, Indent indent) const
{ Superclass::PrintSelf( os, indent ); }
private:
VectorInterpolateImageFunction(const Self&); //purposely not implemented
void operator=(const Self&); //purposely not implemented
};
} // end namespace itk
#endif
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