为了对视频中关键内容是否经受篡改实施有效验证和保护,提出了一种基于运动目标检测的自嵌入视频认证水印方案.由于运动目标集中了视频的关键信息,采用独立分量分析技术从连续的视频帧中分离出运动分量信息生成水印,并用奇异值分解方法对水印作预处理,采用DCT方法自嵌入到视频帧中去.实验结果表明,该水印方案在保证视频质量的前提下,对于常见攻击处理和局部篡改具有很好的鲁棒性,可以有效地验证视频关键信息是否遭到篡改,并且能够恢复出被篡改的关键内容,有效地保护视频完整性.%To find out whether the important content of video had been partly tempered and protect the crucial information, a novel selfembedded video watermarking scheme is proposed based on motion detection. The motion objects attract human' s attention and present as the major content of video, so independent component analysis is used to extract motion information as our watermark from successive frames of original video. Then the watermark is embedded in the DCT domain which is pre-processed by SVD into the video frames. In the premise of ensuring the video quality, the simulations show that the proposed scheme has a good performance to resist common signal processing attacks and local changes, so the results demonstrate that the algorithm could check whether the video had been attacked, and recover the major content very well when the watermarked video is partly tampered to protect the completeness of the video.
展开▼
