qa.qcri.prepocressor.operations.feat

Class MemoryFeatureExtractor

java.lang.Object

qa.qcri.prepocressor.operations.feat.FeatureExtractor

qa.qcri.prepocressor.operations.feat.MemoryFeatureExtractor

public abstract class MemoryFeatureExtractor
extends FeatureExtractor

This abstract class implements a memory for feature extractors such that the extraction can access features and frames in the past.

Author:

Felix Stahlberg

Constructor Summary

Constructors

Constructor and Description
MemoryFeatureExtractor(Configuration conf) Sole constructor.

Method Summary

Methods

Modifier and Type	Method and Description
abstract java.util.List<java.lang.Double>	extractCurrentFeatures(org.opencv.core.Mat frame) Extract features for the current frame.
java.util.List<java.lang.Double>	extractFeatures(org.opencv.core.Mat whole, org.opencv.core.Mat frame) Delegates feature extraction but maintain feature and frame history.

Methods inherited from class java.lang.Object

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

Constructor Detail

MemoryFeatureExtractor

public MemoryFeatureExtractor(Configuration conf)

Sole constructor. Initializes featHistory and frameHistory and stores the configuration.

Parameters:

conf - configuration of the featExtract operation

Method Detail

extractFeatures

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

Delegates feature extraction but maintain feature and frame history.

Specified by:

extractFeatures in class FeatureExtractor

Parameters:

whole - whole input frame

frame - current frame from which to extract features

Returns:

list of features or null if an error occurred

See Also:

featHistory, frameHistory, extractCurrentFeatures(Mat)

extractCurrentFeatures

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

Extract features for the current frame. Implementations can access the variables featHistory and frameHistory storing the last features and frames from newest to last (excluding current frame).

Parameters:

frame - current frame

Returns:

list of features