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Video Watermarking Resistant to Geometric Attacks

Author: JiaMeng
Tutor: LiJie
School: Xi'an University of Electronic Science and Technology
Course: Circuits and Systems
Keywords: Digital Video Watermarking Three - dimensional complex wavelet domain Geometric invariant region Sinusoidal signal mode Geometric attacks
CLC: TP309.7
Type: Master's thesis
Year: 2009
Downloads: 126
Quote: 1
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Abstract


With the development of digital watermarking technology , the digital video watermarking technology has become a protective multimedia video product belongs to the genus . However , in practical applications , the robustness of the watermark technology has not only limited resistance to common video watermark attack , but also for a special class of attack methods - geometric attacks , must also be resistant . This paper studies the digital video watermarking geometric attacks , and to explore the anti - geometric attacks video watermarking for copyright protection and information hiding technique . First, the geometric invariant region to introduce video watermarking algorithm , proposed an anti- geometric attacks video watermarking algorithm combined with wavelet transform . Wavelet transform in order to get a better robustness of the algorithm in the timeline , extracted from the low-pass frames geometric invariant region , select the appropriate parameters and content-based binary chaotic scrambling , the use of quantitative methods repeat embedded watermark information . The watermark information can be extracted blind . The experimental results verify the effectiveness of the proposed video watermarking algorithm . Secondly, based on the analysis of the sinusoidal signal peak response characteristics , combined with three-dimensional complex wavelet transform (3D-CWT) proposed a new resist geometric attacks video watermarking algorithm . For the video to be protected host divided based on the threshold of the lens , will construct a sinusoidal signal mode watermark is embedded into the video footage of the three-dimensional complex wavelet transform domain . Take into account the robustness of the algorithm , subband wavelet coefficients of the imaginary part of the three - dimensional complex wavelet domain watermark embedding ; taking into account the invisibility of the algorithm , the imaginary part of the low-pass subband visual mask to adjust the embedding strength . Watermark detection , make full use of the frequency domain characteristic of the watermark signal peak response suffered geometric attacks estimation and correction . The algorithm can achieve a blind detection of the watermark information . For the performance of the algorithm , the proposed video watermarking algorithm fully test experiments , experimental results show that the digital video watermarking algorithm proposed in this paper not only has good visibility , and can resist geometric attacks including a variety of video watermarks attack . Finally, concludes the paper and gives further direction .

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > General issues > Security and confidentiality > Encryption and decryption
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