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A content-based watermarking scheme for image authentication using discrete wavelet transform inter-coefficient relations

Publication Type : Book Chapter

Publisher : Techniques and Applications for Advanced Information Privacy and Security: Emerging Organizational, Ethical, and Human Issues

Campus : Coimbatore

School : School of Engineering

Department : Computer Science

Year : 2009

Abstract : This chapter discusses a content-based authentication technique based on inter-coefficient relationship of Discrete Wavelet Transform (DWT). Watermark is generated from the first level DWT. An image digest (which is a binary string) is generated from the second level DWT. The watermark is embedded in the mid-frequency coefficients of first level DWT as directed by the image digest. Image authentication is done by computing the Completeness of Signature. The proposed scheme is capable of withstanding incidental image processing operations such as compression and identifies any malicious tampering done on the host image. © 2009, IGI Global.

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