Double Reversible Watermarking Algorithm for Image Tamper Detection

Zhengwei Zhang, Lifa Wu, Haiguang Lai, Huabo Li, Chenghui Zheng
2016 Journal of Information Hiding and Multimedia Signal Processing  
Since existing methods show low tamper detection efficiency and inaccurate positioning, a dual reversible watermarking algorithm with tamper detection based on the multi-scale decomposition is proposed. To begin with, the original image is decomposed into multi-scale image blocks that are non-fixed size but yield high homogeneity. Afterwards, the singular value decomposition is performed on each sub-block and the singular value norm is extracted. Meanwhile, logistic chaotic mapping is used to
more » ... nerate the first authentication watermark. Then, the mean pixel values of each sub-block are calculated for the second authentication watermark. Finally, the logistic chaos is used to design a mapping function between sub-blocks and sub-blocks, and the dual authentication watermarks are embedded into the corresponding mapping block through the generalized difference expansion. The simulation results show that the algorithm not only has high embedding capacity and superior visual quality, but also is very sensitive to tampering, yields high detection efficiency, and can accurately locate the tampered areas..
dblp:journals/jihmsp/ZhangWLLZ16 fatcat:dviw6qd2vbc2pc7h2s44pzkuwa