Multiresolution fragile watermarking using complex chirp signals for content authentication

Authors:
Dan Yu;Farook Sattar;Braham Barkat
Affiliations:
School of Electrical and Electronic Engineering (Block S2), Nanyang Technological University, Nanyang Avenue, Singapore 639798, Singapore;School of Electrical and Electronic Engineering (Block S2), Nanyang Technological University, Nanyang Avenue, Singapore 639798, Singapore;Electrical Engineering Program, Academic Directorate, The Petroleum Institute, P.O. Box 2533, Abu Dhabi, UAE
Venue:
Pattern Recognition
Year:
2006

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Abstract

This paper proposes a wavelet-domain multiresolution fragile watermarking scheme using an improved quantization-index-modulation (QIM) embedding technique. A secure embedding zone is exploited in our proposed scheme to reduce the false detection rate of Kundur's scheme. The frequency modulated (FM) complex chirp signal is employed as watermark. Both the real and the imaginary parts of the chirp signal are embedded simultaneously in a hierarchical manner. Unlike the conventional schemes, the proposed scheme does not require the original watermark for content integrity verification and quality assessment for the distorted watermarked content. The blind authentication process allows embedding of arbitrary FM chirp watermarks.