/usr/include/ITK-4.5/itkNearestNeighborInterpolateImageFunction.h is in libinsighttoolkit4-dev 4.5.0-3.
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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 __itkNearestNeighborInterpolateImageFunction_h
#define __itkNearestNeighborInterpolateImageFunction_h
#include "itkInterpolateImageFunction.h"
namespace itk
{
/** \class NearestNeighborInterpolateImageFunction
* \brief Nearest neighbor interpolation of a scalar image.
*
* NearestNeighborInterpolateImageFunction interpolates image intensity at
* a non-integer pixel position by copying the intensity for the nearest
* neighbor. This class is templated
* over the input image type and the coordinate representation type
* (e.g. float or double).
*
* \ingroup ImageFunctions ImageInterpolators
* \ingroup ITKImageFunction
*/
template< typename TInputImage, typename TCoordRep = double >
class NearestNeighborInterpolateImageFunction:
public InterpolateImageFunction< TInputImage, TCoordRep >
{
public:
/** Standard class typedefs. */
typedef NearestNeighborInterpolateImageFunction Self;
typedef InterpolateImageFunction< TInputImage, TCoordRep > Superclass;
typedef SmartPointer< Self > Pointer;
typedef SmartPointer< const Self > ConstPointer;
/** Run-time type information (and related methods). */
itkTypeMacro(NearestNeighborInterpolateImageFunction,
InterpolateImageFunction);
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** OutputType typedef support. */
typedef typename Superclass::OutputType OutputType;
/** InputImageType typedef support. */
typedef typename Superclass::InputImageType InputImageType;
/** Dimension underlying input image. */
itkStaticConstMacro(ImageDimension, unsigned int, Superclass::ImageDimension);
/** Index typedef support. */
typedef typename Superclass::IndexType IndexType;
/** ContinuousIndex typedef support. */
typedef typename Superclass::ContinuousIndexType ContinuousIndexType;
/** Evaluate the function at a ContinuousIndex position
*
* 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 EvaluateAtContinuousIndex(
const ContinuousIndexType & index) const
{
IndexType nindex;
this->ConvertContinuousIndexToNearestIndex(index, nindex);
return static_cast< OutputType >( this->GetInputImage()->GetPixel(nindex) );
}
protected:
NearestNeighborInterpolateImageFunction(){}
~NearestNeighborInterpolateImageFunction(){}
void PrintSelf(std::ostream & os, Indent indent) const
{ Superclass::PrintSelf(os, indent); }
private:
NearestNeighborInterpolateImageFunction(const Self &); //purposely not
// implemented
void operator=(const Self &); //purposely not
// implemented
};
} // end namespace itk
#endif
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