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18th International Conference on Pattern Recognition (ICPR'06) Volume 2
Occlusion Resistant Shape Classifier based onWarped Optimal Path Matching
Hong Kong
August 20-August 24
ISBN: 0-7695-2521-0
Ninad Thakoor, University of Texas at Arlington
Sungyong Jung, University of Texas at Arlington
Quan Wen, University of Texas at Arlington
Jean Gao, University of Texas at Arlington
In this paper, we present a novel occlusion resistant shape classification scheme for hidden Markov modeled shapes. First, hidden Markov model (HMM) is built using multiple example shapes for each shape class. A reference path for each class is built from the corresponding HMM, which is nothing but optimal path followed by the most likely example shape. The reference path stores temporal information about the entire shape, while the HMM only retains relationship between temporal information. Finally to classify a shape, occluded or not, its optimal path through HMM is calculated and warped to match the reference path using dynamic time warping (DTW). Correct class is identified as the one for which the warping cost is minimum. Classification results obtained for two shape data sets are presented for varying degrees of occlusion and are compared with the conventional maximum likelihood (ML) HMM classifier.
Citation:
Ninad Thakoor, Sungyong Jung, Quan Wen, Jean Gao, "Occlusion Resistant Shape Classifier based onWarped Optimal Path Matching," icpr, vol. 2, pp.60-63, 18th International Conference on Pattern Recognition (ICPR'06) Volume 2, 2006
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