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Vol: 52(66) No: 4 / December 2007 

Digital Watermarking Using Principal Component Analysis
Daniela Stanescu
Computer and Software Engineering Department, “Politehnica” University of Timisoara, Faculty of Automation and Computers, 2 Parvan st., Timisoara, Romania, phone: (40) 256-403271, e-mail: stanescu@ac.upt.ro
Daniel Borca
Computer and Software Engineering Department, “Politehnica” University of Timisoara, Faculty of Automation and Computers, 2 Parvan st., Timisoara, Romania, e-mail: dborca@bitdefender.com
Mircea Stratulat
Computer and Software Engineering Department, “Politehnica” University of Timisoara, Faculty of Automation and Computers, 2 Parvan st., Timisoara, Romania, e-mail: smircea@cs.utt.ro


Keywords: Digital watermarking, Principal Component Analysis, steganography, detectability, DCT

Abstract
Digital watermarking has become a de facto standard used against illicit copying and distribution of copyright material. This paper presents improved methods for embedding signature information, based on the decorrelation property of the Principal Component Analysis (PCA).

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