Spatial querying for retrieval of locomotion patterns in smart environments

Authors:
Gamhewage C. de Silva;Toshihiko Yamasaki;Kiyoharu Aizawa
Affiliations:
The University of Tokyo, Tokyo, Japan;The University of Tokyo, Tokyo, Japan;The University of Tokyo, Tokyo, Japan
Venue:
Proceedings of the 15th international conference on Multimedia
Year:
2007

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Abstract

A system for retrieving video sequences created by tracking humans in a smart environment, by using spatial queries, is presented. Sketches made on a graphical user interface using a pointing device are used as the means of entering multiple types of queries. After preprocessing and coordinate system conversion, the sketches are analyzed to identify the type of the query. Directional search algorithms based on the minimum distance between points is applied for finding the best matches to the sketch. The results are ranked according to the similarity and presented to the user. The results of an initial evaluation are reported. The paper concludes with an outline of possible future directions.