一种基于三维小波变换的盲视频水印算法

A blind video watermark algorithm based on 3D-DWT

为了寻求有效的数字媒体保护方法,本文提出了一种基于三维小波变换的盲视频水印算法。算法将灰度水印图像进行了多分辨率分解和位平面分解为,然后将这些不同分辨率的二值图像嵌入到视频场景中的各帧Y分量的中频小波系数帧相应的子带中,使水印嵌入具有自适应性,嵌入时通过对系数分组并修改每组第一个系数的相对大小来完成,可以实现盲检测。实验结果表明,该文所提出的视频水印算法对MPEG编码、帧平均、帧丢失和帧交换具有良好的鲁棒性。

To develop an effective digital media protection method,a blind video watermarking algorithm is proposed based on video scene segmentation and 3D wavelet transform. A gray scale image is decomposed with different resolution and bitplanedecomposed. Diffrent resolution logical image embedded in the Y componet corresponding resolution of the decomposed video,which makes the watermark be adapted to the original frame.,The watermarking can be extracted without the original video because the embedding pro cedure is by modifying the relative size of coefficient to be completed.The experimental results illustrate that the proposed watermark ing algorithm is robust to Video degradation and distortion attacks,such as MPEG coding,frame averaging,frame dropping and frame swapping.