Ergodic chaotic parameter modulation with application to digital image watermarking.
This paper presents a novel technique for image watermarking based on chaos theory. Chaotic parameter modulation (CPM) is employed to modulate the copyright information into the bifurcating parameter of a chaotic system. The system output is a wideband signal and is used as a watermark to be inserted into the host image. In the detection, a novel method based on the ergodic property of chaotic signal is developed to demodulate the embedded copyright information. Compared to previous works on blind watermarking, the proposed technique can effectively remove the interference from the host image and, thus, improve the detection performance dramatically. Simulation results show that the ergodic CPM approach is effective for image watermarking in terms of noise performance, robustness against attacks, and payload. In addition, its implementation is very simple and the computation speed is fast. Compared to holographic transform domain method and the conventional spread spectrum watermarking scheme, the proposed technique is shown to be superior.
Chen
Siyue
S
Department of Electrical and Computer Engineering, University of Calgary, Calgary, AB T2N 1N4 Canada. chens@ucalgary.ca
Leung
Henry
H
D000465:Algorithms; D003196:Computer Graphics; D016494:Computer Security; D003198:Computer Simulation; D044962:Data Compression / Q000379:methods*; D019146:Hypermedia; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D015233:Models, Statistical; D017711:Nonlinear Dynamics; D010330:Patents as Topic; D010363:Pattern Recognition, Automated / Q000379:methods*; D011356:Product Labeling / Q000379:methods; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012815:Signal Processing, Computer-Assisted; D013269:Stochastic Processes