Image Digital Watermark Based on Genetic Algorithm
Zhicheng Wei, Jufeng Dai · Jisuanji gongcheng · 2007
In order to increase the speed of genetic watermark and improve the robustness and imperceptible of the algorithm,a new embedding and extracting method with genetic algorithm(GA)is proposed.The AC coefficients of image in DCT domain are modified to embed the watermark. The proposed embedding and extracting method is employed to accelerate the genetic watermark so that genetic watermark could be used in practice.The improved GA is used to optimize both the fundamentally conflicting requirements:robustness and invisibility.The experimental results show both the good robustness under attacks and the high fidelity.The time needed to perform the program is greatly decreased.About 1/3 time is saved.