Watermarking scheme of colour image based on chaotic sequences  

作　　者：刘年生 郭东辉 

机构地区：[1]School of Computer Engineering,Jimei University [2]School of Information Science and Technology,Xiamen University

出　　处：《Optoelectronics Letters》2009年第3期227-231,共5页光电子快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No.60076015);the Natural Science Foundation of Fujian Province in China (No.A0640009);the Science Project of Xiamen City in China (No.3502Z20081073);the Foundation for Young Professors of Jimei University in China (No.2006B003)

摘　　要：The proposed perceptual mask is based on the singularity of cover image and matches very well with the properties of the human visual system.The cover colour image is decomposed into several subbands by the wavelet transform.The watermark composed of chaotic sequence and the covert image is embedded into the subband with the largest energy.The chaos system plays an important role in the security invisibility and robustness of the proposed scheme.The parameter and initial state of chaos system can directly influence the generation of watermark information as a key.Moreover,the watermark information has the property of spread spectrum signal by chaotic sequence to improve the invisibility and security of watermarked image.Experimental results and comparisons with other watermarking techniques prove that the proposed algorithm is effective and feasible,and improves the security,invisibility and robustness of watermarking information.The proposed perceptual mask is based on the singularity of cover image and matches very well with the properties of the human visual system. The cover colour image is decomposed into several subbands by the wavelet transform. The watermark composed of chaotic sequence and the covert image is embedded into the subband with the largest energy. The chaos system plays an important role in the security invisibility and robustness of the proposed scheme. The parameter and initial state of chaos system can directly influence the generation of watermark information as a key. Moreover, the watermark information has the property of spread spectrum signal by chaotic sequence to improve the invisibility and security of watermarked image. Experimental results and comparisons with other watermarking techniques prove that the proposed algorithm is effective and feasible, and improves the security, invisibility and robustness of watermarking information.

关 键 词：水印信息 混沌序列 彩色图像 人类视觉系统 混沌系统 安全性 小波变换 图像分解 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]