imagingbook.lib.math

Class VectorNorm.L2

java.lang.Object

imagingbook.lib.math.VectorNorm

imagingbook.lib.math.VectorNorm.L2

Enclosing class:

VectorNorm

public static class VectorNorm.L2
extends VectorNorm

Nested Class Summary

Nested classes/interfaces inherited from class imagingbook.lib.math.VectorNorm

VectorNorm.L1, VectorNorm.L2, VectorNorm.Linf, VectorNorm.NormType

Constructor Summary

Constructors

Constructor and Description
L2()

Method Summary

Modifier and Type	Method and Description
double	distance(double[] a, double[] b) Calculates the distance between two vectors.
double	distance(float[] a, float[] b)
double	distance(int[] a, int[] b)
double	distance2(double[] X, double[] Y)
double	distance2(float[] X, float[] Y)
double	distance2(int[] X, int[] Y)
double	getScale(int n) Returns a factor to scale magnitude and distance values to the range of the vector components of dimensionality n.
double	magnitude(double[] X)
double	magnitude(int[] X)

Methods inherited from class java.lang.Object

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

Constructor Detail

L2

public L2()

Method Detail

magnitude

public double magnitude(double[] X)

Specified by:

magnitude in class VectorNorm

magnitude

public double magnitude(int[] X)

Specified by:

magnitude in class VectorNorm

distance

public double distance(double[] a,
                       double[] b)

Description copied from class: VectorNorm

Calculates the distance between two vectors.

Specified by:

distance in class VectorNorm

Parameters:

a - first vector

b - second vector

Returns:

the distance between vectors a and b

distance2

public double distance2(double[] X,
                        double[] Y)

Specified by:

distance2 in class VectorNorm

Parameters:

X - first vector

Y - second vector

Returns:

the squared distance between vectors a and b

distance

public double distance(int[] a,
                       int[] b)

Specified by:

distance in class VectorNorm

distance2

public double distance2(int[] X,
                        int[] Y)

Specified by:

distance2 in class VectorNorm

getScale

public double getScale(int n)

Description copied from class: VectorNorm

Returns a factor to scale magnitude and distance values to the range of the vector components of dimensionality n. This is prim. used for scaling color distances (n = 3). E.g., if components are distributed in [0,255], the distances multiplied by this factor should again be in [0,255].

Specified by:

getScale in class VectorNorm

Parameters:

n - dimensionality

Returns:

scale factor

distance

public double distance(float[] a,
                       float[] b)

Specified by:

distance in class VectorNorm

distance2

public double distance2(float[] X,
                        float[] Y)

Specified by:

distance2 in class VectorNorm