Please use this identifier to cite or link to this item: https://hdl.handle.net/2440/45034
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Type: Conference paper
Title: The application of nonlinear bistable detectors to DCT-domain watermarking schemes
Author: Duan, F.
Abbott, D.
Citation: Complex Systems II / Derek Abbott, Tomaso Aste, Murray Batchelor, Robert Dewar, Tiziana Di Matteo, Tony Guttmann (eds.):680215-1-680215-10
Publisher: SPIE
Publisher Place: CDROM
Issue Date: 2007
Series/Report no.: Proceedings of SPIE ; 6802
ISBN: 9780819469731
ISSN: 0277-786X
Conference Name: Microelectronics, MEMS, and Nanotechology (2007 : Canberra, Australia)
Editor: Derek Abbott
Statement of
Responsibility: 
Fabing Duan and Derek Abbott
Abstract: A DCT-domain watermarking scheme, based on nonlinear bistable detectors, is presented. A binary copyright character, i.e. watermark, is firstly reordered into a binary zig-zag sequence, and then mapped into pulse amplitude modulated waveforms. A certain desynchronization time delay can be arbitrarily placed into one code of the modulated signal, and is tolerated due to the superior robustness of nonlinear detectors over matched filters. The watermark signal is then embedded in a selected set of DCT coefficients of an image in a medium frequency range. The selected set of DCT coefficients is shuffled via the Arnold transform and looks more like background noise with respect to the watermark signal. The copyright character can be extracted by the nonlinear bistable detector without prior knowledge of the original image, i.e. blind watermark detection. Interestingly, a higher match between the original watermark character and the extracted one can be further achieved using a parallel array of bistable detectors via the mechanism of array stochastic resonance. Robustness of the proposed watermarking scheme is shown in the presence of noise, filtering, cropping and compression.
Description: Copyright 2008 Society of Photo-Optical Instrumentation Engineers. This paper was published in Complex Systems II, edited by Derek Abbott, Tomaso Aste, Murray Batchelor, Robert Dewar, Tiziana Di Matteo, Tony Guttmann, Proc. of SPIE Vol. 6802, 680215 and is made available as an electronic reprint with permission of SPIE. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Rights: Copyright © 2008 SPIE - The International Society for Optical Engineering.
DOI: 10.1117/12.768057
Appears in Collections:Aurora harvest 6
Electrical and Electronic Engineering publications

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