基于对象的抗几何攻击的视频水印算法  

Object Based Watermarking Algorithm Robust to Geometric Transformation Attacks

作　　者：谌志鹏[1] 邹建成[2] 

机构地区：[1]唐山师范学院计算机科学系,河北唐山063000 [2]北方工业大学图像处理与模式识别研究所,北京100041

出　　处：《北京邮电大学学报》2012年第4期33-37,共5页Journal of Beijing University of Posts and Telecommunications

基　　金：国家自然科学基金项目(60835003;61170327);北京市创新团队项目(PHR201007118);唐山师范学院科学研究基金项目(09D07)

摘　　要：MPEG-4标准中基于对象的编码方法具有较好的交互性、可存取性,同时也带来了版权保护的问题.为此,提出一种基于对象的水印算法,该算法使得视频对象从一个视频序列被移动到另一个序列中,仍然能正确提取出水印.该算法通过Radon变换校正视频对象的旋转角度和缩放尺度,将水印嵌入到SA-DCT域中的部分系数中.实验结果表明,该算法能够和MPEG-4编码器有机整合、失真小,能抵抗旋转、缩放等几何攻击.One of the key points of the MPEG-4 standard is the possibility to access and manipulate ob- jects within a video sequence, but it increases the demand for information security protection and multi- media authentication technologies. An object based watermarking algorithm is proposed, which can cor- rectly access the data embedded in the object. To resist against scaling and rotation attacks, two general- ized Radon transformations are used. The watermark is embedded in the quantized SA-DCT coefficients. Experiments show that the algorithm is low-distortion, robust to geometry transformation attacks. And the algorithm can integrate with the MPEG-4 codec very well.

关 键 词：视频对象 对象水印 RADON变换 SA-DCT 几何变换 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]