cc.mallet.fst.confidence

Class TransducerSequenceConfidenceEstimator

java.lang.Object

cc.mallet.fst.confidence.TransducerSequenceConfidenceEstimator

Direct Known Subclasses:

MaxEntSequenceConfidenceEstimator, MinSegmentConfidenceEstimator, NBestViterbiConfidenceEstimator, QBCSequenceConfidenceEstimator, RandomSequenceConfidenceEstimator, SegmentProductConfidenceEstimator, ViterbiConfidenceEstimator, ViterbiRatioConfidenceEstimator

public abstract class TransducerSequenceConfidenceEstimator
extends java.lang.Object

Abstract class that estimates the confidence of a Sequence extracted by a Transducer.Note that this is different from TransducerConfidenceEstimator, which estimates the confidence for a single Segment.

Constructor Summary

Constructors

Constructor and Description
TransducerSequenceConfidenceEstimator(Transducer model)

Method Summary

Modifier and Type	Method and Description
abstract double	estimateConfidenceFor(Instance instance, java.lang.Object[] startTags, java.lang.Object[] inTags) Calculates the confidence in the tagging of a Sequence.
InstanceWithConfidence[]	rankInstancesByConfidence(InstanceList ilist, java.lang.Object[] startTags, java.lang.Object[] continueTags) Ranks all Sequencess in this InstanceList by confidence estimate.

Methods inherited from class java.lang.Object

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

Constructor Detail

TransducerSequenceConfidenceEstimator

public TransducerSequenceConfidenceEstimator(Transducer model)

Method Detail

estimateConfidenceFor

public abstract double estimateConfidenceFor(Instance instance,
                                             java.lang.Object[] startTags,
                                             java.lang.Object[] inTags)

Calculates the confidence in the tagging of a Sequence.

rankInstancesByConfidence

public InstanceWithConfidence[] rankInstancesByConfidence(InstanceList ilist,
                                                          java.lang.Object[] startTags,
                                                          java.lang.Object[] continueTags)

Ranks all Sequencess in this InstanceList by confidence estimate.

Parameters:

ilist - list of segmentation instances

startTags - represent the labels for the start states (B-) of all segments

continueTags - represent the labels for the continue state (I-) of all segments

Returns:

array of InstanceWithConfidences ordered by non-decreasing confidence scores, as calculated by estimateConfidenceFor