Querying out-of-vocabulary words in lexicon-based keyword spotting

Querying out-of-vocabulary words in lexicon-based keyword spotting Lexicon-based handwritten text keyword spotting (KWS) has proven to be a faster and more accurate alternative to lexicon-free methods. Nevertheless, since lexicon-based KWS relies on a predefined vocabulary, fixed in the training phase, it does not support queries involving out-of-vocabulary (OOV) keywords. In this paper, we outline previous work aimed at solving this problem and present a new approach based on smoothing the (null) scores of OOV keywords by means of the information provided by “similar” in-vocabulary words. Good results achieved using this approach are compared with previously published alternatives on different data sets. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Neural Computing and Applications Springer Journals

Querying out-of-vocabulary words in lexicon-based keyword spotting

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Publisher
Springer Journals
Copyright
Copyright © 2016 by The Natural Computing Applications Forum
Subject
Computer Science; Artificial Intelligence (incl. Robotics); Data Mining and Knowledge Discovery; Probability and Statistics in Computer Science; Computational Science and Engineering; Image Processing and Computer Vision; Computational Biology/Bioinformatics
ISSN
0941-0643
eISSN
1433-3058
D.O.I.
10.1007/s00521-016-2197-8
Publisher site
See Article on Publisher Site

Abstract

Lexicon-based handwritten text keyword spotting (KWS) has proven to be a faster and more accurate alternative to lexicon-free methods. Nevertheless, since lexicon-based KWS relies on a predefined vocabulary, fixed in the training phase, it does not support queries involving out-of-vocabulary (OOV) keywords. In this paper, we outline previous work aimed at solving this problem and present a new approach based on smoothing the (null) scores of OOV keywords by means of the information provided by “similar” in-vocabulary words. Good results achieved using this approach are compared with previously published alternatives on different data sets.

Journal

Neural Computing and ApplicationsSpringer Journals

Published: Feb 3, 2016

References

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