My research efforts have focused on quick and accurate retrieval from a huge number of multimedia signal archives.

• Very quick retrieval for audio and video archives    >> Click here for details
• Quick identification of partial images and videos    >> Click here for details
• Efficient semi-supervised learning of topic models and its applications
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Currently my research effort focuses on salient region extraction from images and videos. Especially, I am interested in constructing computational models of the early human visual system.

• Computational model of temporal dynamics of early human visual system
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• Stochastic model of selective visual attention with dynamic Bayesian network
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• Saliency-based video segmentation with sequentially updated priors
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• Cognitive developmental approach to human-like visual scene understanding
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My recent studies include theoretical analysis of communication with multiple senders, multiple channels and multiple receivers, especially from the standpoint of data compression.

• Weak variable-length coding in Slepian-Wolf coding system   >> Click here for details
• Complementary delivery of information    >> Click here for details

Multimedia information retrieval is closely related to Shannon theory, especially to network source coding. I am also interested in clarifying their relationships.

• Shannon-theoretical analysis of index searching    >> Click here for details