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Multimedia Tools and Applications

, Volume 22, Issue 3, pp 215–234 | Cite as

Web Access to Large Audiovisual Assets Based on User Preferences

  • K. Karpouzis
  • G. Moschovitis
  • K. Ntalianis
  • S. Ioannou
  • S. Kollias
Article

Abstract

Current multimedia databases contain a wealth of information in the form of audiovisual as well as text data. Even though efficient search algorithms have been developed for either media, there still exists the need for abstract presentation and summarization of the results of database users' queries. Moreover, multimedia retrieval systems should be capable of providing the user with additional information related to the specific subject of the query, as well as suggest other topics which could be identified to attract the interest of users with a similar profile. In this paper, we present solutions to these issues, giving as an example an integrated architecture we have developed, along with notions that support efficient and secure Internet access to audiovisual/video databases. Segmentation of each video in shots is followed by shot classification in a number of predetermined categories. Generation of users' profiles according to the categories, enhanced by relevance feedback, permits an efficient presentation of retrieved video shots or characteristic frames in terms of the user interest in them. Moreover, this clustering scheme assists the notion of ‘lateral’ links that enable the user to continue retrieval with data of similar nature or content to those already returned. Furthermore, user groups are formed and modeled by registering actual preferences and practices. This enables the system to ‘predict’ information that is possibly relevant to the user's interest and present it along with the returned results. The concepts utilized in this system can be smoothly integrated in MPEG-7 compatible multimedia database systems.

multimedia databases web access video summarization dynamic search user profiling query expansion 

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Copyright information

© Kluwer Academic Publishers 2004

Authors and Affiliations

  • K. Karpouzis
    • 1
  • G. Moschovitis
    • 1
  • K. Ntalianis
    • 1
  • S. Ioannou
    • 1
  • S. Kollias
    • 1
  1. 1.Image, Video and Multimedia Laboratory, Electrical and Computer Engineering DepartmentNational Technical University of AthensAthensGreece

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