be.tarsos.lsh.families

Class CosineHash

java.lang.Object

be.tarsos.lsh.families.CosineHash

All Implemented Interfaces:

HashFunction, java.io.Serializable

public class CosineHash
extends java.lang.Object
implements HashFunction

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
CosineHash(int dimensions)

Method Summary

Modifier and Type	Method and Description
int	hash(Vector vector) Hashes a vector of arbitrary dimensions to an integer.

Methods inherited from class java.lang.Object

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

Constructor Detail

CosineHash

public CosineHash(int dimensions)

Method Detail

hash

public int hash(Vector vector)

Description copied from interface: HashFunction

Hashes a vector of arbitrary dimensions to an integer. The hash function needs to be locality sensitive to work in the locality sensitive hash (LSH) scheme. Meaning that vectors that are 'close' according to some metric have a high probability to end up with the same hash.

Specified by:

hash in interface HashFunction

Parameters:

vector - The vector to hash. Can have any number of dimensions.

Returns:

A locality sensitive hash (LSH). Vectors that are 'close' according to some metric have a high probability to end up with the same hash.