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Detection thresholding using mutual information
Ó Conaire, Ciarán; O'Connor, Noel E.; Cooke, Eddie; Smeaton, Alan F.
In this paper, we introduce a novel non-parametric thresholding method that we term Mutual-Information Thresholding. In our approach, we choose the two detection thresholds for two input signals such that the mutual information between the thresholded signals is maximised. Two efficient algorithms implementing our idea are presented: one using dynamic programming to fully explore the quantised search space and the other method using the Simplex algorithm to perform gradient ascent to significantly speed up the search, under the assumption of surface convexity. We demonstrate the effectiveness of our approach in foreground detection (using multi-modal data) and as a component in a person detection system.
Keyword(s): Information retrieval; thresholding; mutual-information; fusion; multi-modal
Publication Date:
Type: Other
Peer-Reviewed: Unknown
Language(s): English
Institution: Dublin City University
Citation(s): Ó Conaire, Ciarán, O'Connor, Noel E. ORCID: 0000-0002-4033-9135 <>, Cooke, Eddie and Smeaton, Alan F. ORCID: 0000-0003-1028-8389 <> (2006) Detection thresholding using mutual information. In: VISAPP 2006 - International Conference on Computer Vision Theory and Applications, 25-28 February 2006, Setubal, Portugal.
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First Indexed: 2009-11-05 02:00:35 Last Updated: 2019-02-09 07:04:13