de.unihalle.informatik.MiToBo.segmentation.levelset.core

Class MTBLevelsetFunctionDerivable

java.lang.Object

de.unihalle.informatik.MiToBo.segmentation.levelset.core.MTBLevelsetFunctionDerivable

All Implemented Interfaces:

MTBSegmentationInterface

Direct Known Subclasses:

MTBLevelsetFunctionPDE

public abstract class MTBLevelsetFunctionDerivable
extends Object
implements MTBSegmentationInterface

Level set function supporting optimization based on variational calculus.

Author:

Michael Schneider, Birgit Moeller

Nested Class Summary

Nested classes/interfaces inherited from interface de.unihalle.informatik.MiToBo.segmentation.basics.MTBSegmentationInterface

MTBSegmentationInterface.SegmentationDimension

Constructor Summary

Constructors

Constructor and Description
MTBLevelsetFunctionDerivable()

Method Summary

Modifier and Type	Method and Description
abstract double	get(int x, int y, int z) Get the function value at position (x,y,z).
abstract double	getCurvature(int x, int y, int z) Curvature at point (x,y,z).
abstract double	getDerivativeX(int x, int y, int z) Partial derivative in x direction at position (x,y,z).
abstract double	getDerivativeXX(int x, int y, int z) Second partial derivative in x direction at position (x,y,z).
abstract double	getDerivativeXY(int x, int y, int z) Second partial derivative in x-y direction at position (x,y,z).
abstract double	getDerivativeXZ(int x, int y, int z) Second partial derivative in x-z direction at position (x,y,z).
abstract double	getDerivativeY(int x, int y, int z) Partial derivative in y direction at position (x,y,z).
abstract double	getDerivativeYY(int x, int y, int z) Second partial derivative in y direction at position (x,y,z).
abstract double	getDerivativeYZ(int x, int y, int z) Second partial derivative in y-z direction at position (x,y,z).
abstract double	getDerivativeZ(int x, int y, int z) Partial derivative in z direction at position (x,y,z).
abstract double	getDerivativeZZ(int x, int y, int z) Second partial derivative in z direction at position (x,y,z).
boolean	nearZero(int x, int y, int z) Checks if a pixel belongs to the zero level.
protected int	sgn(double val) Signum function.
abstract boolean	valid(int x, int y, int z) Validity of point (x,y,z).

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface de.unihalle.informatik.MiToBo.segmentation.basics.MTBSegmentationInterface

getClass, getClass, getDimension, getMask, getMaxLabel, getNumberOfClasses, getSizeX, getSizeY, getSizeZ, getWeight, getWeight, isVisible, isVisible, setClass, setClass, setInvisible, setInvisible, setVisible, setVisible, setWeight, setWeight

Constructor Detail

MTBLevelsetFunctionDerivable

public MTBLevelsetFunctionDerivable()

Method Detail

get

public abstract double get(int x,
                           int y,
                           int z)

Get the function value at position (x,y,z).

Parameters:

x - Coordinate in x.

y - Coordinate in y.

z - Coordinate in z.

Returns:

Value of level set function at given position.

getDerivativeX

public abstract double getDerivativeX(int x,
                                      int y,
                                      int z)

Partial derivative in x direction at position (x,y,z).

Parameters:

x - Coordinate in x.

y - Coordinate in y.

z - Coordinate in z.

Returns:

Derivative value.

getDerivativeY

public abstract double getDerivativeY(int x,
                                      int y,
                                      int z)

Partial derivative in y direction at position (x,y,z).

Parameters:

x - Coordinate in x.

y - Coordinate in y.

z - Coordinate in z.

Returns:

Derivative value.

getDerivativeZ

public abstract double getDerivativeZ(int x,
                                      int y,
                                      int z)

Partial derivative in z direction at position (x,y,z).

Parameters:

x - Coordinate in x.

y - Coordinate in y.

z - Coordinate in z.

Returns:

Derivative value.

getDerivativeXX

public abstract double getDerivativeXX(int x,
                                       int y,
                                       int z)

Second partial derivative in x direction at position (x,y,z).

Parameters:

x - Coordinate in x.

y - Coordinate in y.

z - Coordinate in z.

Returns:

Derivative value.

getDerivativeYY

public abstract double getDerivativeYY(int x,
                                       int y,
                                       int z)

Second partial derivative in y direction at position (x,y,z).

Parameters:

x - Coordinate in x.

y - Coordinate in y.

z - Coordinate in z.

Returns:

Derivative value.

getDerivativeZZ

public abstract double getDerivativeZZ(int x,
                                       int y,
                                       int z)

Second partial derivative in z direction at position (x,y,z).

Parameters:

x - Coordinate in x.

y - Coordinate in y.

z - Coordinate in z.

Returns:

Derivative value.

getDerivativeXY

public abstract double getDerivativeXY(int x,
                                       int y,
                                       int z)

Second partial derivative in x-y direction at position (x,y,z).

Parameters:

x - Coordinate in x.

y - Coordinate in y.

z - Coordinate in z.

Returns:

Derivative value.

getDerivativeXZ

public abstract double getDerivativeXZ(int x,
                                       int y,
                                       int z)

Second partial derivative in x-z direction at position (x,y,z).

Parameters:

x - Coordinate in x.

y - Coordinate in y.

z - Coordinate in z.

Returns:

Derivative value.

getDerivativeYZ

public abstract double getDerivativeYZ(int x,
                                       int y,
                                       int z)

Second partial derivative in y-z direction at position (x,y,z).

Parameters:

x - Coordinate in x.

y - Coordinate in y.

z - Coordinate in z.

Returns:

Derivative value.

getCurvature

public abstract double getCurvature(int x,
                                    int y,
                                    int z)

Curvature at point (x,y,z).

Parameters:

x - Coordinate in x.

y - Coordinate in y.

z - Coordinate in z.

Returns:

Curvature value.

valid

public abstract boolean valid(int x,
                              int y,
                              int z)

Validity of point (x,y,z).

Parameters:

x - Coordinate in x.

y - Coordinate in y.

z - Coordinate in z.

Returns:

If true, point is valid and will be considered in calculations.

nearZero

public boolean nearZero(int x,
                        int y,
                        int z)

Checks if a pixel belongs to the zero level.

Parameters:

x - x coordinate of point.

y - y coordinate of point.

z - z coordinate of point.

Returns:

True, if point belongs to zero-level, false otherwise.

sgn

protected int sgn(double val)

Signum function.

Parameters:

val - Value to check.

Returns:

1, if value is greater zero, otherwise -1.