机构地区: 浙江大学
出 处: 《电子学报》 2004年第1期21-24,共4页
摘 要: 视频数字水印技术是当前水印研究中的一个热点 .本文提出一种视频数字水印新算法 ,直接对压缩后的视频数据流进行操作 ,根据运动矢量的特征值 ,将水印信息嵌入到运动矢量上 ,不需要完全解码和再编码过程 .所提出的水印算法简单、有效 ,实现了水印盲检 .与嵌入水印前的原视频图像相比 ,嵌入水印后的视频图像信噪比损失很小 . Digital watermarking technology of video image is a hot topic in present watermarking researching area. A new watermarking algorithm for video images is proposed. By operating the compressed video data-stream directly, we embed watermarking information into motion vectors according to the motion-vector feature, therefore, complete decoding and re-encoding are unnecessary. The proposed algorithm is simple and efficient. Moreover, watermark can be extracted blindly without original images. Compared with that of image reconstructed from un-watermarked video sequences, PSNRs of watermarked frames are reduced slightly.
领 域: [自动化与计算机技术] [自动化与计算机技术]