org.openimaj.feature

Class CachingFeatureExtractor<FEATURE,OBJECT extends Identifiable>

java.lang.Object

org.openimaj.feature.CachingFeatureExtractor<FEATURE,OBJECT>

Type Parameters:

FEATURE - Type of feature

OBJECT - Type of object

All Implemented Interfaces:

FeatureExtractor<FEATURE,OBJECT>

public class CachingFeatureExtractor<FEATURE,OBJECT extends Identifiable>
extends Object
implements FeatureExtractor<FEATURE,OBJECT>

A simple wrapper for a feature extractor that caches the extracted feature to a HashMap. If a feature has already been generated for a given object, it will be re-read from the HashMap

Author:

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

Constructor Summary

Constructors

Constructor and Description
CachingFeatureExtractor(FeatureExtractor<FEATURE,OBJECT> extractor) Construct the cache HashMap.
CachingFeatureExtractor(FeatureExtractor<FEATURE,OBJECT> extractor, boolean force) Construct the cache HashMap The given extractor will be used to generate the features.

Method Summary

Methods

Modifier and Type	Method and Description
FEATURE	extractFeature(OBJECT object) Extract features from an object and return them.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

CachingFeatureExtractor

public CachingFeatureExtractor(FeatureExtractor<FEATURE,OBJECT> extractor)

Construct the cache HashMap. The given extractor will be used to generate the features.

Parameters:

extractor - the feature extractor

CachingFeatureExtractor

public CachingFeatureExtractor(FeatureExtractor<FEATURE,OBJECT> extractor,
                       boolean force)

Construct the cache HashMap The given extractor will be used to generate the features. Optionally, all features can be regenerated.

Parameters:

extractor - the feature extractor

force - if true, then all features will be regenerated and saved, rather than being loaded.

Method Detail

extractFeature

public FEATURE extractFeature(OBJECT object)

Description copied from interface: FeatureExtractor

Extract features from an object and return them.

Specified by:

extractFeature in interface FeatureExtractor<FEATURE,OBJECT extends Identifiable>

Parameters:

object - the object to extract from

Returns:

the extracted feature

toString

public String toString()

Overrides:

toString in class Object