基于最低位有效算法和变化元素的矢量动画水印方案

Digital watermarking scheme of vector animation based on least significant bit algorithm and changed elements

提出一种充分利用矢量动画的矢量数据存储方式和时序特性的盲水印方案。首先,采用矢量动画相邻帧间变化元素的颜色值作为水印嵌入目标;然后,以最低位有效算法作为嵌入/提取算法,并将多组水印进行编码后嵌入到矢量动画中;最后,根据提取的多组水印进行相互验证、优化,得出准确的水印。理论分析与实验结果表明,所提算法易实现,具有良好的鲁棒性,能实现篡改提示效果,且能在载体播放时实时嵌入与提取水印。

For the vacancies on digital watermarking technology based on 2D-vector animation, this paper proposed a blind watermarking scheme which made full use of vector characteristics and the timing characteristics. This scheme adopted color values of adjacent frames in vector animation changed elements as embedded target. And it used Least Significant Bit （LSB） algorithm as embedding/extraction algorithm, which embedded multiple group watermarks to vector animation. FinMly the accurate watermark could be obtained by verifying the extracted multiple group watermarks. Theoretical analysis and experimental results show that this scheme is not only easy to implement and well in robustness, but also can realize tamper- proofing. What＇s more, the vector animation can be played in real-time during the watermark embedding and extraction.