Video watermark based on optical flow method and digital holographic

Abstract

The invention relates to a new video watermark technology based on hologram and optical flow technology. Firstly, local optical flow information is used to detect a key frame on the time axis of the video sequence, and then the hologram of the original watermark image is obtained by using holographic technology, and then embedded into the intermediate frequency coefficient of the discrete cosine transform domain of the key frame of the host video, and the watermark is added to the position And the side information in the original key frame is used as the key to restore the watermark information, the process of extracting the watermark does not need the original video, so this method has better security. The test results of the present invention also show that the method has high robustness to common video processing operations such as frame cutting, noise addition, frame exchange, MPEG compression and format conversion.

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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