以改进影像逼真度为约束条件的变换域水印嵌入强度  

Upper limit of embedded strength of transformation domain digital watermarking under invisible target of improved image fidelity constraint

作　　者：尹忠海[1] 简剑峰[1] 周利华[1] 陈婕[1] 季虹[1] 

机构地区：[1]西安电子科技大学计算机网络与信息安全教育部重点实验室

出　　处：《西安电子科技大学学报》2005年第3期339-343,共5页Journal of Xidian University

摘　　要：在改进影像逼真度透明性指标约束下,对变换域数字水印各AC系数嵌入强度的上限进行了讨论,给出了满足改进影像逼真度约束的嵌入强度上限估计式.该结论及其推论可作为影像逼真度透明性指标的充分条件,用于确定数字水印的嵌入强度maxΔFuv及嵌入版本数r等具体参数.实验结果证明了该结论的有效性.The upper limit of embedded strength of transformation domain digital watermarking under the invisible target of improved image fidelity constraint is discussed. Also, the evaluation expression of embedded strength under the above constraint is presented. This conclusion and its inference can be regarded as a sufficient requirement, used to determine the embedding parameters of watermarking such as the embedded strength max |ΔFuv| and the number of embedded editions r. The experimental results have proved the validity of the conclusion.

关 键 词：影像逼真度 误差 水印 嵌入强度 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]