TAILIEUCHUNG - Báo cáo hóa học: " Research Article Video Data Hiding for Managing Privacy Information in Surveillance Systems"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Video Data Hiding for Managing Privacy Information in Surveillance Systems | Hindawi Publishing Corporation EURASIP Journal on Information Security Volume 2009 Article ID 236139 18 pages doi 2009 236139 Research Article Video Data Hiding for Managing Privacy Information in Surveillance Systems Jithendra K. Paruchuri 1 Sen-ching S. Cheung 1 and Michael W. Hail2 1 Center for Visualization and Virtual Environments Department of Electrical and Computer Engineering University of Kentucky Lexington KY 40507 USA 2 Institute for Regional Analysis and Public Policy Morehead State University Morehead KY 40351 USA Correspondence should be addressed to Jithendra K. Paruchuri jkparu0@ Received 10 May 2009 Accepted 15 September 2009 Recommended by Deepa Kundur From copyright protection to error concealment video data hiding has found usage in a great number of applications. In this work we introduce the detailed framework of using data hiding for privacy information preservation in a video surveillance environment. To protect the privacy of individuals in a surveillance video the images of selected individuals need to be erased blurred or re-rendered. Such video modifications however destroy the authenticity of the surveillance video. We propose a new rate-distortion-based compression-domain video data hiding algorithm for the purpose of storing that privacy information. Using this algorithm we can safeguard the original video as we can reverse the modification process if proper authorization can be established. The proposed data hiding algorithm embeds the privacy information in optimal locations that minimize the perceptual distortion and bandwidth expansion due to the embedding of privacy data in the compressed domain. Both reversible and irreversible embedding techniques are considered within the proposed framework and extensive experiments are performed to demonstrate the effectiveness of the techniques. Copyright 2009 Jithendra K. Paruchuri et al. This is an open access article distributed under the Creative Commons Attribution

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