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Speeding up the similarity search in multimedia database

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3 Author(s)
Chen, T. ; Beckman Inst. for Adv. Sci. & Technol., Illinois Univ., Urbana, IL, USA ; Nakazato, M. ; Huang, T.S.

In recent years, applications in multimedia databases have been more and more important. One new capability is to search by similarity in low-level image features (such as color, texture, shape, and motion). The performance of the similarity search highly relies on efficient index structures. However, current high-dimensional indexing techniques have limitations and a simple sequential scan algorithm can outperform them in many cases. We notice that few researchers have really evaluated the utilization of the actual memory size and the trade-off between I/O access time and computation time. Some methods tried to reduce the I/O access time but caused computation overhead. We propose a novel indexing technique, the RA-Blocks (Region Approximated Blocks), to overcome these limitations and improve the similarity search in multimedia databases. We also demonstrate the better performance of our work in experiments.

Published in:

Multimedia and Expo, 2002. ICME '02. Proceedings. 2002 IEEE International Conference on  (Volume:2 )

Date of Conference:

2002

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