Robust video watermarking method based on tensor singular value decomposition

Abstract

The invention discloses a robust video watermarking method based on tensor singular value decomposition. The method includes that at an embedded end, the LL sub-band of the brightness component of each frame in the original video is extracted, wherein the LL sub-bands of every three frames form a first three-order tensor, each first three-order tensor is divided into sub tensors, a color watermarkimage is divided into sub blocks, the diagonal tensor of each sub-block serves as watermark information to be embedded into the corresponding sub-tensor, then a watermark-containing sub-tensor is obtained, and finally a watermark-containing video is obtained; at an extraction end, LL sub-bands of brightness components of each frame in a video containing watermarks are extracted, the LL sub-bandsof every three frames form a second three-order tensor, each second three-order tensor is divided into sub tensors, diagonal tensors of the sub-tensors are processed, watermark information is extracted, and finally a watermark image is obtained through extraction. The method has the advantages that the time domain information and the space domain information of the video are combined together, therelationship between the time domain and the space domain of the video is fully utilized, the robustness is good, and the imperceptibility is good.

Description

technical field [0001] The invention relates to a video watermark technology, in particular to a robust video watermark method based on tensor singular value decomposition. Background technique [0002] With the rapid development of the Internet and digital technology, digital multimedia has been widely used, and digital video is becoming more and more popular, but the illegal dissemination and download of digital video seriously damages the legitimate rights and interests of users. Therefore, the copyright protection of digital video has become an urgent problem to be solved. The digital watermark technology provides an effective way for digital video copyright protection, it embeds identifiable information into the original multimedia data. [0003] Video watermarking technology can be divided into: airspace video watermarking technology and frequency domain video watermarking technology. Spatial video watermarking technology is simple to calculate, but its robustness is...

AI Technical Summary

Problems solved by technology

The above-mentioned video watermarking technology does not take into account the time domain information of the video, but only treats the video as a series of continuous still images, and embeds the watermark image into this series of continuous images, so that the watermark information is easily perceived by the attacker , thus causing the watermark information to be destroyed by the attacker, which eventually leads to the inability to protect the copyright security of the video well, and the robustness is poor

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