Short Communication: A multimedia retrieval framework highlighting agents and coordinating their interactions to address the semantic gap

  • Authors:
  • M. Belkhatir;H. C. Thiem

  • Affiliations:
  • Lyon Institute of Technology, Université de Lyon I, Campus de la Doua, 69100, France;Lyon Institute of Technology, Université de Lyon I, Campus de la Doua, 69100, France

  • Venue:
  • Expert Systems with Applications: An International Journal
  • Year:
  • 2010

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Abstract

State-of-the-art approaches for the semantic characterization of the visual content rely on segmentation techniques outputting static entities such as rectangular regions, blobs or multimedia objects. Once these entities are highlighted, additional external information allowing to refine this characterization within knowledge bases (e.g. the fact that semantic concepts sky and sun corresponding to these entities often co-occur) is ignored due to the difficulty of integrating it a priori within these static approaches. We formulate the hypothesis that this information is important in the process of highlighting the semantic visual content and propose an architecture based on image agents, abstract structures representing the visual entities of the image content, which integrate it dynamically. For this, we investigate the formation of semantic concepts within a population of multimedia agents. We first propose a learning framework linking the automatically-extracted visual content to these agents. We then develop an architecture allowing the communication of image agents about the perceived semantic concepts by taking into account the external information incrementally. We validate our proposition in a system-based evaluation framework on a corpus of real world color photographs.