org.openimaj.lsh.functions

Class FloatCauchyFactory

java.lang.Object

org.openimaj.lsh.functions.RandomisedHashFunctionFactory<float[]>

org.openimaj.lsh.functions.FloatHashFunctionFactory

org.openimaj.lsh.functions.FloatPStableFactory

org.openimaj.lsh.functions.FloatCauchyFactory

All Implemented Interfaces:

HashFunctionFactory<float[]>

public class FloatCauchyFactory
extends FloatPStableFactory

A hash function factory for producing hash functions that use a Cauchy distribution to approximate L1 distance.

Author:

Jonathon Hare (jsh2@ecs.soton.ac.uk)

Nested Class Summary

Nested classes/interfaces inherited from class org.openimaj.lsh.functions.FloatPStableFactory

FloatPStableFactory.PStableFunction

Field Summary

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

ndims, rng

Constructor Summary

Constructors

Constructor and Description
FloatCauchyFactory(int ndims, cern.jet.random.engine.MersenneTwister rng, double w) Construct the factory with the given parameters.

Method Summary

Modifier and Type	Method and Description
org.openimaj.lsh.functions.FloatCauchyFactory.Function	create() Construct a new HashFunction.
protected FloatFVComparison	fvDistanceFunction()

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

distanceFunction

Methods inherited from class java.lang.Object

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

Constructor Detail

FloatCauchyFactory

public FloatCauchyFactory(int ndims,
                          cern.jet.random.engine.MersenneTwister rng,
                          double w)

Construct the factory with the given parameters.

Parameters:

ndims - number of dimensions of the data

rng - the random number generator

w - the width parameter

Method Detail

create

public org.openimaj.lsh.functions.FloatCauchyFactory.Function create()

Description copied from interface: HashFunctionFactory

Construct a new HashFunction.

Returns:

the new HashFunction

fvDistanceFunction

protected FloatFVComparison fvDistanceFunction()

Specified by:

fvDistanceFunction in class FloatHashFunctionFactory