I received my B.E. degree from the National
Institute of Technology Karnatata, Surathkal and a M.E. degree in Electrical
and Computer Engineering from the Indian
Institute of Science, Bangalore. After completion of graduate study, I joined IBM Research, New Delhi as a research staff
member. While at IBM, I worked on research projects related to crop area estimation from
satellite imagery, and, relevance feedback for image and video retrieval. My contribution
relates to exploiting negative feedback (retrieved results tagged by the user as not
relevant to the current query) to refine the search space. A small set of labeled
examples are available during relevance feedback which leads to poor generalization
performance in supervised learning methods. To circumvent this problem, we propose a
space partitioning algorithm for uni-modal queries that employs the negative examples
to infer a convex polytope containing the relevant set and yields improved performance
over a SVM based classification approach.
I am presently a Ph.D. candidate in the IVC
group at Boston University. I am involved in research
related to object detection, person tracking and sign language recognition. My
dissertation topic relates to exploiting linguistics constraints for handshape
recognitions in signing video with a goal towards building a person independent large
vocabulary sign recognizing system. Handshapes play a key role in in sign language
with linguistic rules governing the transitions among different handshapes within a
sign. My thesis explores a probabilistic formulation to express and exploit linguistic
constraints on handshapes employed in lexical signs (lexical signs are the largest
class of signs in most signed languages). We propose non-rigid image alignment towards
obtaining robust similarity measures to match handshape appearance across different
signers. In collaborations with linguists, I am also involved in the collection and
preparation of a large corpus of American Sign Language (ASL) video annotated with
linguistic information.
I have served as a reviewer for CIVR, CVPR, ECCV, ICCV, IJCV and Transactions on Image
Processing. I served as an organizer of IVC seminars during 2009-2010.
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