/usr/include/ITK-4.5/itkInterpolateImageFunction.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 __itkInterpolateImageFunction_h
#define __itkInterpolateImageFunction_h
#include "itkImageFunction.h"
namespace itk
{
/** \class InterpolateImageFunction
* \brief Base class for all image interpolaters.
*
* InterpolateImageFunction is the base for all ImageFunctions that
* interpolates image intensity at a non-integer pixel position.
* This class is templated over the input image type and the
* coordinate representation type (e.g. float or double ).
*
* \warning This hierarchy of functions work only for images
* with scalar pixel types. For images of vector pixel types
* use VectorInterpolateImageFunctions.
*
* \sa VectorInterpolateImageFunction
* \ingroup ImageFunctions ImageInterpolators
*
*
* \ingroup ITKImageFunction
*/
template< typename TInputImage, typename TCoordRep = double >
class InterpolateImageFunction:
public ImageFunction< TInputImage,
typename NumericTraits< typename TInputImage::PixelType >::RealType, TCoordRep >
{
public:
/** Standard class typedefs. */
typedef InterpolateImageFunction Self;
typedef ImageFunction< TInputImage,
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(InterpolateImageFunction, ImageFunction);
/** 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);
/** 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;
/** RealType typedef support. */
typedef typename NumericTraits< typename TInputImage::PixelType >::RealType RealType;
/** Interpolate the image at a point 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 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
{
return ( static_cast< RealType >( this->GetInputImage()->GetPixel(index) ) );
}
protected:
InterpolateImageFunction(){}
~InterpolateImageFunction(){}
void PrintSelf(std::ostream & os, Indent indent) const
{ Superclass::PrintSelf(os, indent); }
private:
InterpolateImageFunction(const Self &); //purposely not implemented
void operator=(const Self &); //purposely not implemented
};
} // end namespace itk
#endif
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