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    • CAS: Computer Science: Technical Reports
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    •   OpenBU
    • College of Arts and Sciences
    • Computer Science
    • CAS: Computer Science: Technical Reports
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    Exploiting phonological constraints for handshape inference in ASL video

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    Date Issued
    2011-05-15
    Author(s)
    Thangali, Ashwin
    Nash, Joan
    Sclaroff, Stan
    Neidle, Carol
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    Permanent Link
    https://hdl.handle.net/2144/11370
    Citation (published version)
    Thangali, Ashwin; Nash, Joan; Sclaroff, Stan; Neidle, Carol. "Exploiting Phonological Constraints for Handshape Inference in ASL Video", Technical Report BUCS-TR-2011-013, Computer Science Department, Boston University, May 15, 2011. [Available from: http://hdl.handle.net/2144/11370]
    Abstract
    Handshape is a key linguistic component of signs, and thus, handshape recognition is essential to algorithms for sign language recognition and retrieval. In this work, linguistic constraints on the relationship between start and end handshapes are leveraged to improve handshape recognition accuracy. A Bayesian network formulation is proposed for learning and exploiting these constraints, while taking into consideration inter-signer variations in the production of particular handshapes. A Variational Bayes formulation is employed for supervised learning of the model parameters. A non-rigid image alignment algorithm, which yields improved robustness to variability in handshape appearance, is proposed for computing image observation likelihoods in the model. The resulting handshape inference algorithm is evaluated using a dataset of 1500 lexical signs in American Sign Language (ASL), where each lexical sign is produced by three native ASL signers.
    Collections
    • CAS: Computer Science: Technical Reports [585]
    • CAS: Linguistics: Scholarly Papers [51]


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