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如何有效抵抗几何形变的攻击是当今数字水印研究的热点和难点之一.提出一种能够有效抵抗几何攻击的鲁棒视频水印方案,在其嵌入方案中,提出了一种针对几何形变的不变量——平均交流能量(AVERAGEACENERGY,AAE).利用该不变量,并使用小波变换的空-频特性和人眼视觉特性嵌入有意义水印;在水印提取方案中,提出了最佳白化滤波器,能够根据视频的统计特性设计白化滤波器的参数,有效提高检测性能.实验结果表明,该水印方案有效提高了视频的视觉质量,同时具有很强的抵抗几何形变攻击的能力,对于其他攻击,如时间维上的低通滤波、去帧等攻击也具有很强的鲁棒性.
How to effectively resist geometric deformation attacks is one of the hot and difficult issues in digital watermarking research today.We propose a robust video watermarking scheme that can effectively resist geometric attacks. In its embedded scheme, an invariant - AVERAGEACENERGY (AAE) .Using this invariant, embedding a meaningful watermark using the spatio-temporal characteristics of wavelet transform and human visual characteristics; in the watermark extraction scheme, the best whitening filter According to the statistical characteristics of the video, the parameters of the whitening filter are designed to improve the detection performance effectively.The experimental results show that this watermarking scheme can effectively improve the visual quality of the video and has a strong ability of resisting geometric deformation attacks. For other attacks, such as time On the low-pass filtering, to the frame and other attacks also have strong robustness.