Representing sea ice knowledge in a Dempster-Shafer belief system

Leen Kiat Soh, Costas Tsatsoulis, Todd Bowers, Andrew Williams

Research output: Contribution to conferencePaper

3 Scopus citations

Abstract

In this paper, we describe the sea ice knowledge acquisition and representation effort involved in an intelligent system called the Advanced Reasoning using Knowledge for Typing Of Sea Ice (ARKTOS) for satellite sea ice classification. ARKTOS first uses a segmentation technique to extract contiguous sea ice regions (features), then computes attributes of each feature, and finally applies an expert system to classify the features. To classify the features using an expert system, we obtained transcripts regarding the sea ice applications and domain through interviews with sea ice experts. A qualification process ensued to identify relevant attributes and to also provide a consistent reference for all rules. To enable the utility of the rules in a Dempster-Shafer belief system, each rule is also associated with a number that indicates how confident one feels about the assertions made by the rule if it is actually fired. Once fired, the belief system accumulates the evidence and handles conflicting hypotheses systematically to arrive at a classification of the feature. Our current implementation of ARKTOS facilitates improvement of the reasoning process by allowing expert users to evaluate and edit numerous aspects of the rules or sea ice knowledge conveniently. Presently, we have included a graphical user interface package to enable visual evaluation for such knowledge refinement. ARKTOS is able to classify ERS and RADARSAT sea ice imagery satisfactorily based on the current rule bases.

Original languageEnglish (US)
Pages2234-2236
Number of pages3
StatePublished - 1998
EventProceedings of the 1998 IEEE International Geoscience and Remote Sensing Symposium, IGARSS. Part 1 (of 5) - Seattle, WA, USA
Duration: Jul 6 1998Jul 10 1998

Other

OtherProceedings of the 1998 IEEE International Geoscience and Remote Sensing Symposium, IGARSS. Part 1 (of 5)
CitySeattle, WA, USA
Period7/6/987/10/98

ASJC Scopus subject areas

  • Computer Science Applications
  • Earth and Planetary Sciences(all)

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    Soh, L. K., Tsatsoulis, C., Bowers, T., & Williams, A. (1998). Representing sea ice knowledge in a Dempster-Shafer belief system. 2234-2236. Paper presented at Proceedings of the 1998 IEEE International Geoscience and Remote Sensing Symposium, IGARSS. Part 1 (of 5), Seattle, WA, USA, .