org.openimaj.lsh.functions

Class DoublePStableFactory.PStableFunction

java.lang.Object

org.openimaj.lsh.functions.RandomisedHashFunction<double[]>

org.openimaj.lsh.functions.DoubleHashFunction

org.openimaj.lsh.functions.DoublePStableFactory.PStableFunction

All Implemented Interfaces:

HashFunction<double[]>

Enclosing class:

DoublePStableFactory

protected abstract class DoublePStableFactory.PStableFunction
extends DoubleHashFunction

Field Summary

Fields

Modifier and Type	Field and Description
protected double	b
protected double[]	r

Fields inherited from class org.openimaj.lsh.functions.RandomisedHashFunction

random

Method Summary

Modifier and Type	Method and Description
int	computeHashCode(double[] point) Compute the hash code for the object
int	computeHashCode(SparseDoubleArray array) Compute the hash code for the sparse array.

Methods inherited from class org.openimaj.lsh.functions.DoubleHashFunction

computeHashCode, computeHashCode

Methods inherited from class java.lang.Object

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

Field Detail

r

protected double[] r

b

protected double b

Method Detail

computeHashCode

public final int computeHashCode(double[] point)

Description copied from interface: HashFunction

Compute the hash code for the object

Parameters:

point - the object

Returns:

the hash code

computeHashCode

public int computeHashCode(SparseDoubleArray array)

Description copied from class: DoubleHashFunction

Compute the hash code for the sparse array. This method converts the sparse array to a dense one and computes the hash code from that. Subclasses should override this method for improved performance.

Overrides:

computeHashCode in class DoubleHashFunction

Parameters:

array - the sparse array

Returns:

the hash code