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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 sitkInterpolator_h
#define sitkInterpolator_h
#include "sitkCommon.h"
#include <ostream>
namespace itk
{
namespace simple
{
enum InterpolatorEnum {
/** \brief Nearest-neighbor interpolation
* \sa itk::NearestNeighborInterpolateImageFunction
*/
sitkNearestNeighbor = 1,
/** \brief N-D linear interpolation
* \sa itk::LinearInterpolateImageFunction
*/
sitkLinear = 2,
/** \brief B-Spline of order 3 interpolation
* \sa itk::BSplineInterpolateImageFunction
*/
sitkBSpline = 3,
/** \brief Gaussian interpolation
*
* Sigma is set to 0.8 input pixels and alpha is 4.0
*
* \sa itk::GaussianInterpolateImageFunction
*/
sitkGaussian = 4,
/** \brief Smoothly interpolate multi-label images
*
* Sigma is set to 1.0 input pixels and alpha is 1.0
*
* \sa itk:LabelImageGaussianInterpolateImageFunction
*/
sitkLabelGaussian = 5,
/** \brief Windowed sinc interpolation
*
* \f[ w(x) = 0.54 + 0.46 cos(\frac{\pi x}{m} ) \f]
*
* \sa itk::WindowedSincInterpolateImageFunction
* \sa itk::Function::HammingWindowFunction
*/
sitkHammingWindowedSinc = 6,
/** \brief Windowed sinc interpolation
*
* \f[ w(x) = cos(\frac{\pi x}{2 m} ) \f]
*
* \sa itk::WindowedSincInterpolateImageFunction
* \sa itk::Function::CosineWindowFunction
*/
sitkCosineWindowedSinc = 7,
/** \brief Windowed sinc interpolation
*
* \f[ w(x) = 1 - ( \frac{x^2}{m^2} ) \f]
*
* \sa itk::WindowedSincInterpolateImageFunction
* \sa itk::Function::WelchWindowFunction
*/
sitkWelchWindowedSinc = 8,
/** \brief Windowed sinc interpolation
*
* \f[ w(x) = \textrm{sinc} ( \frac{x}{m} ) \f]
*
* \sa itk::WindowedSincInterpolateImageFunction
* \sa itk::Function::LanczosWindowFunction
*/
sitkLanczosWindowedSinc = 9,
/** \brief Windowed sinc interpolation
*
* \f[ w(x) = 0.42 + 0.5 cos(\frac{\pi x}{m}) + 0.08 cos(\frac{2 \pi x}{m}) \f]
*
* \sa itk::WindowedSincInterpolateImageFunction
* \sa itk::Function::BlackmanWindowFunction
*/
sitkBlackmanWindowedSinc = 10
};
#ifndef SWIG
/**
* Convert Interpolator enum to a string for printing etc..
*/
SITKCommon_EXPORT std::ostream& operator<<(std::ostream& os, const InterpolatorEnum i);
#endif
} // end namespace simple
} // end namespace itk
#endif // sitkInterpolator_h
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