基于Logistic混沌序列和IWT的可逆水印算法研究  

Reversible Watermarking Scheme Based on Logistic Chaotic Sequence and IWT

作　　者：梅旭时[1] 蒋晓丹[2] 周漪鋆 MEI Xushi;JIANG Xiaodan;ZHOU Yijun(Jinhua Polytechnic,Jinhua 321007,China;Quzhou University,Quzhou 324000,Chin)

机构地区：[1]金华职业技术学院,浙江金华321007 [2]衢州学院,浙江衢州324000

出　　处：《金华职业技术学院学报》2020年第3期67-72,共6页Journal of Jinhua Polytechnic

基　　金：国家级大学生创新创业训练计划项目(201911488003)。

摘　　要：为了能够满足提取水印后准确恢复出原始图像,利用IWT可实现图像的无损重构和Logistics混沌序列随机性、遍历性等特性,设计基于Logistic混沌序列和IWT的可逆水印算法。算法对载体图像进行整数小波变换分解,在低频子带LL中利用Logistics混沌序列水印嵌入位置。实验表明,该算法不可感知性好,水印嵌入容量较大,算法复杂度低,运行速度快,对剪切攻击等也显示出较好的鲁棒性。This paper proposes a reversible watermark scheme based on the Logistic chaotic sequence and IWT to recover the original image accurately after extracting the watermark,which is using the characteristics of IWT,such as lossless reconstruction of image,randomness and ergodicity.The original host image is transformed by integer wavelet transform,and embeds the watermark in the low frequency sub-band by using the logistic chaotic sequence.Simulation results show that the proposed watermarking scheme has good imperceptibility,large watermark embedding capacity,low algorithm complexity,fast running speed,and good robustness to shear attack.

关 键 词：IWT LOGISTIC混沌序列 可逆水印 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]