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Summary: Nearest Neighbor Search Methods for Handshape
Recognition
Michalis Potamias 1 and Vassilis Athitsos 2
1 Computer Science Department, Boston University
2 Computer Science and Engineering Department, University of Texas at Arlington
ABSTRACT
Gestures are an important modality for humanmachine communi
cation, and robust gesture recognition can be an important com
ponent of intelligent homes and assistive environments in general.
An important aspect of gestures is handshape. Handshapes can
hold important information about the meaning of a gesture, for ex
ample in sign languages, or about the intent of an action, for ex
ample in manipulative gestures or in virtual reality interfaces. At
the same time, recognizing handshape can be a very challenging
task, because the same handshape can look very different in dif
ferent images, depending on the 3D orientation of the hand and
the viewpoint of the camera. In this paper we examine a database
approach for handshape classification, whereby a large database
of tens of thousands of images is used to represent the wide vari
ability of handshape appearance. Efficient and accurate indexing
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