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AbstractÐIn this paper, we propose a modified version of the K-means algorithm to cluster data. The proposed algorithm adopts a novel nonmetric distance measure based on the idea of ªpoint symmetry.º This kind of ªpoint symmetry distanceº can be applied in data clustering and human face detection. Several data sets are used to illustrate its effectiveness.doi:10.1109/34.927466 fatcat:yqwavmc4y5eyxeitc77oaudqaa