数字水印图像实现产品技术安全保护仿真  

Digital Watermarking Image Realization Product Technology Security Protection Simulation

作　　者：卢信文[1] LU Xin - wen(Chengdu College of University of Electronic Science and Technology of China, Chengdu Sichuan 610091 ,China)

机构地区：[1]电子科技大学成都学院,四川成都610091

出　　处：《计算机仿真》2017年第10期334-337,共4页Computer Simulation

摘　　要：对静态图像进行数字水印,能够对产品技术安全起到有效保护作用。对静态图像的数字水印,需要通过边缘掩蔽特性,确定全局自适应掩蔽因子,将其作为数字水印嵌入的强度,完成对静态图像水印。传统方法选取静态图像的YIQ色彩空间的Y分量嵌入水印,从而定义视觉掩蔽函数,但忽略了确定全局自适应掩蔽因子,导致数字水印效果不理想。提出基于Dasiy描述子的虚拟现实技术下图像数字水印算法。上述算法先对水印信息进行Arnold变换,对静态图像中的各个像素点进行描述,利用BSP树对Dasiy特征空间进行划分,考虑到虚拟现实技术下人类视觉系统的特点,依据静态图像的亮度、纹理和边缘掩蔽特性确定全局自适应掩蔽因子,将其作为数字水印嵌入的强度,由此完成虚拟现实技术下静态图像数字水印。实验结果表明,所提算法能够有效提升数字图像的水印不可见性,对常见的水印攻击手段具有良好的效果。A digital watermark algorithm of image under virtual reality technology based on Dasiy descriptor is proposed. Arnold conversion for watermark information is carried out and each pixel in static image is described ,then BSP tree is used to divide Dasiy feature space. Considering feature of human visual system under virtual reality tech- nology, overall adaptive masking factor is confirmed according to brightness, texture and edge masking characteristics of static image. Moreover, the adaptive masking factor is used as embedded strength of digital watermark. Thus, the digital watermark of static image is completed. Simulation results show that the proposed algorithm can improve in- visibility of digital watermark image effectively. It has favorable effect for common attack technique of watermark.

关 键 词：数字水印图像 产品技术 安全保护 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]