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Proceedings Paper

New detector for spread-spectrum based image watermarking using underdetermined ICA
Author(s): Hafiz Malik; Ashfaq Khokhar; Rashid Ansari
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Paper Abstract

This paper presents a novel scheme for detection of watermarks embedded in multimedia signals using spread spectrum (SS) techniques. The detection method is centered on using the model that the embedded watermark and the host signal are mutually independent. The proposed detector assumes that the host signal and the watermark obey non-Gaussian distributions. The proposed blind watermark detector employs underdetermined blind source separation (BSS) based on independent component analysis (ICA) for watermark estimation from the watermarked image. The mean-field theory based undetermined BSS scheme is used for watermark estimation. Analytical results are presented showing that the proposed detector performs significantly better than the existing correlation based blind detectors traditionally used for SS-based image watermarking.

Paper Details

Date Published: 17 February 2006
PDF: 12 pages
Proc. SPIE 6072, Security, Steganography, and Watermarking of Multimedia Contents VIII, 60721Y (17 February 2006); doi: 10.1117/12.643559
Show Author Affiliations
Hafiz Malik, Univ. of Illinois at Chicago (United States)
Ashfaq Khokhar, Univ. of Illinois at Chicago (United States)
Rashid Ansari, Univ. of Illinois at Chicago (United States)

Published in SPIE Proceedings Vol. 6072:
Security, Steganography, and Watermarking of Multimedia Contents VIII
Edward J. Delp III; Ping Wah Wong, Editor(s)

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