【摘要】 创造性地运用了lorenz混沌系统,实现了数字图像的加密。为lorenz混沌系统选择一个初始值,得到一个加密矩阵。因为混沌系统的不可预测性和对初值的敏感依赖性,该加密矩阵是图像所有人之外的人无法得到的;从而有力地保障了数字图像的版权。在检测水印的时候,只需要拥有少量数据,就可以完成水印的提取。攻击实验研究表明,提出的算法,具有很好的抗规则剪切、不规则剪切、加噪、压缩的能力,具有很好的鲁棒性。更多还原

【Abstract】 The Lorenz chaotic system is creatively used to encrypt digital images in this paper.An initial data is chosen for the Lorenz chaotic system,and then an encrypted matrix is got.For the sake of unpredictability of the chaotic system and the sensitivity dependence to the initial data,the encrypted matrix is unknown except the owner of the digital image,the copy right of the digital image can then be effectively protected.The watermarking can be extracted with just a few data when to be detected,and the experimental results of attack show that the algorithm presented in this paper has very excellent capability against both regular cut and irregular cut as well as noise and compression and has high robustness.更多还原