Video watermark based on optical flow method and digital holographic

Abstract

The invention relates to a video watermark technology based on an optical flow method and digital holographic, which comprises the steps of: firstly, detecting a key frame by using local light stream information on a video sequence time shaft, then obtaining an original watermark image hologram by using a holographic technology, then embedding in a medium frequency coefficient of a discrete cosine transform domain of a host video key frame, and using edge information of a watermark adding position and the original key frame as a secret key of recovering the watermark information, wherein the process of extracting watermarks does not need original video. Therefore, the method has better safety. Test results to the invention prove that the method has higher stability to common video processing operations such as frame shearing, noise adding, frame exchanging, MPEG (Moving Picture Experts Group) compression, format transform, and the like.

Description

technical field [0001] The invention relates to the technical field of watermarking, in particular to a video watermarking method based on optical flow method and digital holography. Background technique [0002] With the development of the information society, the Internet provides a large amount of digital media information data in various forms such as images, videos and audios. While the Internet provides convenient services, some users who have not obtained the corresponding media certification can easily obtain digital media through the Internet, and use it for themselves after a little modification. How to protect the copyright of the original creator? How to locate whether the original information has been tampered with? Digital watermark technology is to embed some identification information (that is, digital watermark) directly into the digital carrier, but it does not affect the use value of the original carrier, and it is not easy to be detected or noticed by th...

AI Technical Summary

Problems solved by technology

While the Internet provides convenient services, some users who have not obtained the corresponding media certification can easily obtain digital media through the Internet, and use it for themselves after a little modification. How to protect the copyright of the original creator? How to locate whether the original information has been tampered with? Digital watermark technology is to embed some identification information (that is, digital watermark) directly into the digital carrier, but it does not affect the use value of the original carrier, and it is not easy to be detected or noticed by the human perception system (such as the visual or auditory system).

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