2006 | OriginalPaper | Buchkapitel
A Rotation-Invariant Secure Image Watermarking Algorithm Incorporating Steerable Pyramid Transform
verfasst von : Jiangqun Ni, Rongyue Zhang, Jiwu Huang, Chuntao Wang, Quanbo Li
Erschienen in: Digital Watermarking
Verlag: Springer Berlin Heidelberg
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Robustness and security are the key issues in the development of image watermarking algorithm. A new rotation invariant security image watermarking algorithm based on steerable pyramid transform is proposed in this paper. The algorithm is characterized as follows: (1) the rotation invariance and robust watermarking are achieved concurrently on the same transform domain; (2) the rotation synchronization is obtained through template matching by using steerable pyramid transform, which satisfies the shiftability in orientation condition; (3) the watermarks are embedded into an oriented subband at angle
θ
, which can be interpolated with base filter kernels and used as a key in watermark detection to increase the security of watermark; (4) the watermark detector is designed based on the steerable vector HMM model. High robustness is observed against StirMark attacks and their joint attacks.