Journal
JOURNAL OF INTELLIGENT & FUZZY SYSTEMS
Volume 42, Issue 3, Pages 2005-2021Publisher
IOS PRESS
DOI: 10.3233/JIFS-211397
Keywords
Evidence theory; conflicting evidence; combination rule; evidence distance; Belief Mover's Distance
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This study proposes a new method for fusing conflicting evidence by defining a new evidence distance metric and computing weights. It aims to address the issue of counter-intuitive results when using the classical Dempster's rule with highly conflicting evidence. Experimental results demonstrate that the proposed method is remarkably effective compared to other methods.
The Dempster-Shafer evidence theory has been extensively used in various applications of information fusion owing to its capability in dealing with uncertain modeling and reasoning. However, when meeting highly conflicting evidence, the classical Dempster's combination rule may give counter-intuitive results. To address this issue, we propose a new method in this work to fuse conflicting evidence. Firstly, a new evidence distance metric, named Belief Mover's Distance, which is inspired by the Earth Mover's Distance, is defined to measure the difference between two pieces of evidence. Subsequently, the credibility weight and distance weight of each piece of evidence are computed according to the Belief Mover's Distance. Then, the final weight of each piece of evidence is generated by unifying these two weights. Finally, the classical Dempster's rule is employed to fuse the weighted average evidence. Several examples and applications are presented to analyze the performance of the proposed method. Experimental results manifest that the proposed method is remarkably effective in comparison with other methods.
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