Video watermarking scheme based on phase angle of motion vector
Mingming Hao · Journal of Computer Applications · 2010
Based on the phase angle of motion vector,a video watermarking scheme was proposed.In this paper,the phase angle section from 0 to 2π was divided into two different angle section sets.Besides,every angle section was then divided into two parts.By judging whether the embedded watermark information is 0 or 1,and the phase angle of the motion vector belongs to left part or right part in the angle section set,the motion vector was rotated by a fixed tiny value.In this way,the watermark was embedded.The experimental results show that after embedding the watermark,there is no difference between the original image and that of embedded watermark.The fluctuation of PSNR was controlled within a limited area,and by noising,filtering,deleting,rotating and other way,so the watermark could be extracted accurately.Simulation results show that the scheme has little impact on video quality,and has strong robustness.