#include <itkAdvancedLinearInterpolateImageFunction.h>

Detailed Description

template<typename TInputImage, typename TCoordinate = double>
class itk::AdvancedLinearInterpolateImageFunction< TInputImage, TCoordinate >

Linearly interpolate an image at specified positions.

AdvancedLinearInterpolateImageFunction linearly 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).

This function works for N-dimensional images.

This function works for images with scalar and vector pixel types, and for images of type VectorImage.

Unlike the LinearInterpolateImageFunction, which implements a constant boundary condition, this class implements a mirroring boundary condition, which mimics the BSplineInterpolateImageFunction.

Edge cases, i.e. points exactly on the right most edge of the image, need to be dealt with separately. In this implementation we subtract a small number from the continuous index and interpolate at that position. Alternatively, you would need to implement 7 different possibilities in 3D, e.g.: x[0] is at end index -> interpolate in x-y plane x[0] and x[1] are at end index -> interpolate along z line all are at end index -> nearest neighbor interpolation We opt to subtract a small number from x, which is computationally efficient, gives cleaner code, and almost exactly the same interpolated value.

See also: VectorAdvancedLinearInterpolateImageFunction

\wiki \wikiexample{ImageProcessing/LinearInterpolateImageFunction,Linearly interpolate a position in an image} \endwiki

Definition at line 63 of file itkAdvancedLinearInterpolateImageFunction.h.

Inheritance diagram for itk::AdvancedLinearInterpolateImageFunction< TInputImage, TCoordinate >:

Classes
struct	Dispatch
struct	DispatchBase

Public Types
using	ConstPointer = SmartPointer<const Self>
using	ContinuousIndexValueType = typename ContinuousIndexType::ValueType
using	CovariantVectorType = CovariantVector<OutputType, Self::ImageDimension>
using	InputImageSpacingType = typename InputImageType::SpacingType
using	Pointer = SmartPointer<Self>
using	Self = AdvancedLinearInterpolateImageFunction
using	Superclass = LinearInterpolateImageFunction<TInputImage, TCoordinate>

Public Member Functions
CovariantVectorType	EvaluateDerivativeAtContinuousIndex (const ContinuousIndexType &x) const
void	EvaluateValueAndDerivativeAtContinuousIndex (const ContinuousIndexType &x, OutputType &value, CovariantVectorType &deriv) const
	ITK_DISALLOW_COPY_AND_MOVE (AdvancedLinearInterpolateImageFunction)
	itkOverrideGetNameOfClassMacro (AdvancedLinearInterpolateImageFunction)
	itkStaticConstMacro (ImageDimension, unsigned int, Superclass::ImageDimension)

Static Public Member Functions
static Pointer	New ()

Protected Member Functions
	AdvancedLinearInterpolateImageFunction ()=default
	~AdvancedLinearInterpolateImageFunction () override=default

Private Member Functions
void	EvaluateValueAndDerivativeOptimized (const Dispatch< 2 > &, const ContinuousIndexType &x, OutputType &value, CovariantVectorType &deriv) const
void	EvaluateValueAndDerivativeOptimized (const Dispatch< 3 > &, const ContinuousIndexType &x, OutputType &value, CovariantVectorType &deriv) const
void	EvaluateValueAndDerivativeOptimized (const DispatchBase &, const ContinuousIndexType &x, OutputType &value, CovariantVectorType &deriv) const
void	EvaluateValueAndDerivativeUnOptimized (const ContinuousIndexType &, OutputType &, CovariantVectorType &) const