#include <Interpolator.h>

Collaboration diagram for Isis::Interpolator:

Public Types
enum	interpType { None = 0, NearestNeighborType = 1, BiLinearType = 2, CubicConvolutionType = 4 }
	The interpolator type, including: None, Nearest Neighbor, BiLinear or Cubic Convultion. More...

Public Member Functions
	Interpolator ()
	Constructs an empty Interpolator object. More...

	Interpolator (const interpType &type)
	Constructs an Interpolator object, and sets the type of interpolation. More...

	~Interpolator ()
	Destroys the Interpolator object. More...

double	Interpolate (const double isamp, const double iline, const double buf[])
	Performs an interpolation on the data according to the parameters set in the constructor. More...

void	SetType (const interpType &type)
	Sets the type of interpolation. More...

int	Samples ()
	Returns the number of samples needed by the interpolator. More...

int	Lines ()
	Returns the number of lines needed by the interpolator. More...

double	HotSample ()
	Returns the sample coordinate of the center pixel in the buffer for the interpolator. More...

double	HotLine ()
	Returns the line coordinate of the center pixel in the buffer for the interpolator. More...

Detailed Description

Pixel interpolator.

This class is used for interpolating buffers of pixel data. It is usually associated with spacial translation, rotations and scaling in geometric warping algorithums (i.e., rubber sheeting). When special-pixel values are found in the data buffer the current interpolator is abandonded and the next lower interpolator is used instead (i.e.; if Cubic-convolution can not be performed then a bi-linear is used and if the bi-linear can not be performed then nearest-neighbor will be used.

Author: 2002-10-09 Stuart Sides

Member Enumeration Documentation

◆ interpType

enum Isis::Interpolator::interpType

The interpolator type, including: None, Nearest Neighbor, BiLinear or Cubic Convultion.

Enumerator
None
NearestNeighborType
BiLinearType
CubicConvolutionType

Constructor & Destructor Documentation

◆ Interpolator() [1/2]

Isis::Interpolator::Interpolator ( )

Constructs an empty Interpolator object.

◆ Interpolator() [2/2]

Isis::Interpolator::Interpolator ( const interpType & type )

Constructs an Interpolator object, and sets the type of interpolation.

Parameters

type	The type of interpolation to be performed. (NearestNeighbor, BiLinear or CubicConvulsion)

See also: Interpolator.h

◆ ~Interpolator()

Isis::Interpolator::~Interpolator ( )

Destroys the Interpolator object.

Member Function Documentation

◆ HotLine()

double Isis::Interpolator::HotLine ( )

Returns the line coordinate of the center pixel in the buffer for the interpolator.

Returns: The line coordinate of the center pixel.

References _FILEINFO_, and Isis::None.

Referenced by Isis::DemShape::DemShape(), Isis::Chip::Extract(), Isis::ProcessRubberSheet::processPatchTransform(), and Isis::ProcessRubberSheet::StartProcess().

◆ HotSample()

double Isis::Interpolator::HotSample ( )

Returns the sample coordinate of the center pixel in the buffer for the interpolator.

Returns: The sample coordinate of the center pixel.

References _FILEINFO_, and Isis::None.

Referenced by Isis::DemShape::DemShape(), Isis::Chip::Extract(), Isis::ProcessRubberSheet::processPatchTransform(), and Isis::ProcessRubberSheet::StartProcess().

◆ Interpolate()

double Isis::Interpolator::Interpolate	(	const double	isamp,
		const double	iline,
		const double	buf[]
	)

Performs an interpolation on the data according to the parameters set in the constructor.

If the buffer contains special pixel values then the current interpolation is abandoned and the next lower type of interpolation is attempted. The order from highest to lowest is (Cubic Convolution, Bi-linear and Nearest Neighbor).

Parameters

isamp	The exact sample position being interpolated within the image.
iline	The exact line position being interpolated within the image.
buf[]	The buffer of data to be interpolated. The buffer is assumed to be the correct dimensions for the interpolator.

References _FILEINFO_, and Isis::None.

Referenced by Isis::Chip::Extract(), and Isis::DemShape::localRadius().