Distance metric learning for content identification

Authors:
Dalwon Jang;Chang D. Yoo;Ton Kalker
Affiliations:
Department of Electrical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Korea;Department of Electrical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Korea;Hewlett-Packard Laboratories, Multimedia Communications and Networking Laboratory, Palo Alto, CA
Venue:
IEEE Transactions on Information Forensics and Security
Year:
2010

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Abstract

This paper considers a distance metric learning (DML) algorithm for a fingerprinting system, which identifies a query content by finding the fingerprint in the database (DB) that measures the shortest distance to the query fingerprint. For a given training set consisting of original and distorted fingerprints, a distance metric equivalent to the lp norm of the difference of two linearly projected fingerprints is learned by minimizing the false-positive rate (probability of perceptually dissimilar content to be identified as being similar) for a given false-negative rate (probability of perceptually similar content to be identified as being dissimilar). The learned metric can perform better than the often used lp distance and improve the robustness against a set of unexpected distortions. In the experiments, the distance metric learned by the proposed algorithm performed better than those metrics learned by well-known DML algorithms for classification.