Applying blocking and frame grouping to design a robust and imperceptible video watermark

Authors:
Xingjun Wang;Baozhong Hao
Affiliations:
Department of Electronic Engineering, Tsinghua University, Beijing, China;Department of Electronic Engineering, Tsinghua University, Beijing, China
Venue:
ICIC'12 Proceedings of the 8th international conference on Intelligent Computing Theories and Applications
Year:
2012

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Abstract

In this paper we apply blocking and frame grouping jointly to design a robust and imperceptible video watermark. We use blocking to relax the strict pixel synchronization requirements of traditional pixel-based spread spectrum watermarking to block. We introduce frame grouping to further improve the robustness. Dividing the frame sequences into groups ensures the watermark robust to frame rate changes and greatly improve the robustness by summing the weighted cross-correlation coefficients. We analyze imperceptibility-robustness constraints of our video watermarking algorithm. Experimental results show that our blocking mechanism is a big step forward for solving the geometric distortion problems of conventional correlation-based watermarking in the blind detection process. Blocking and frame grouping contribute to design high robust, imperceptible, and low complicated video watermarks.