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In most reversible compressed video watermarking schemes, there is a particular problem that the distortion of image quality will be spread and accumulated. In this paper, we analyze the problem of distortion drift caused by reversible watermarking in compressed video, and then a lossless drift compensation scheme for compressed video is proposed. The experimental results show that the lossless drift...
This paper presents a new mathematical definition of straight-line optical flow. By using 21 straight-line optical flows in 3 consecutive image frames, a set of equations about 3D motion parameters are established to obtain 12 motion parameters of 3D object and coordinates of the 3D straight line. Usually, it is difficult to find the 21 straight lines on correspondence. In this paper, a minimum of...
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