摘要
提出了一种能识别二次扫描和印刷的半脆弱数字水印算法。该算法利用了矩阵奇异值的特性和印刷过程中色域转换的误差,对常见的几何攻击有较强的抵抗能力,同时对原始图像扫描和印刷的次数有着严格的要求,适用于印刷品防伪。
This paper novel digital watermark algorithm identifying scan and printing times, which can be used in printing anti-counterfeiting. The algorithm makes use of the character of singularity value and the error in color-space conversion, making it robust for the geometric distortion and sensitive for the times of scan and printing.
出处
《电子技术应用》
北大核心
2010年第10期136-138,142,共4页
Application of Electronic Technique
关键词
数字水印
半脆弱
门票防伪
奇异值分解
混沌序列
digital watermark
semi-fragile
ticket anti-counterfeiting
singularity value divides (SVD)
chaos sequence