qa.qcri.prepocressor.operations.feat

Class FeatureExtractor

java.lang.Object

qa.qcri.prepocressor.operations.feat.FeatureExtractor

Direct Known Subclasses:

ANHDFFeatureExtractor, ConcavityFeatureExtractor, DirectionalFeatureExtractor, DistributionFeatureExtractor, MemoryFeatureExtractor, RawFeatureExtractor, RunlengthsFeatureExtractor

public abstract class FeatureExtractor
extends java.lang.Object

This is the most general super class for feature extractors.

Author:

Felix Stahlberg

See Also:

#extractFeatures()

Constructor Summary

Constructors

Constructor and Description
FeatureExtractor(Configuration conf) Sole constructor.

Method Summary

Methods

Modifier and Type	Method and Description
abstract java.util.List<java.lang.Double>	extractFeatures(org.opencv.core.Mat whole, org.opencv.core.Mat frame) Extract features from the given frame.

Methods inherited from class java.lang.Object

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

Constructor Detail

FeatureExtractor

public FeatureExtractor(Configuration conf)

Sole constructor.

Parameters:

conf - featExtract configuration

Method Detail

extractFeatures

public abstract java.util.List<java.lang.Double> extractFeatures(org.opencv.core.Mat whole,
                                               org.opencv.core.Mat frame)

Extract features from the given frame. The length of the returned array should be always the same as long as the height of the frame matrix stays the same.

Parameters:

whole - whole input frame

frame - current frame from which to extract features

Returns:

list of features or null if an error occurred

Throws:

java.lang.NullPointerException - if frame is null