Geometrical-attack-resistant video zero-watermark generating method and geometrical-attack-resistant video zero-watermark generating device

Abstract

The invention provides a geometrical-attack-resistant video zero-watermark generating method and a geometrical-attack-resistant video zero-watermark generating device. The method or the device comprises the steps or units of a step or unit for extracting a key frame image in a video through a pixel frame averaging method; a step or unit for processing the key frame image, performing singular value decomposition on a low-frequency sub-band of the key frame image after processing and obtaining a singular value decomposition coefficient after decomposition; a step or unit for encrypting a watermark image and generating a watermark crytograph; and a step or unit for performing XOR processing on the watermark crytograph and the singular value decomposition coefficient, forming a zero watermark and registering the water mark into a third-party database. The geometrical-attack-resistant video zero-watermark generating method and the geometrical-attack-resistant video zero-watermark generating device have advantages of realizing no direct digital watermark embedding in a video, generating the watermark in the database, improving watermark robustness of the video, effectively resisting geometrical attacks such as translation, rotation and zooming, balancing contradiction between watermark robustness and video definition in embedding a traditional digital watermark, and realizing no modification for any video data.

Description

technical field [0001] The invention relates to the technical field of digital image processing, in particular to a method and device for generating a video zero watermark against geometric attacks. Background technique [0002] With the development of science and technology and the continuous improvement of human life, multimedia technology has been more and more widely used, and multimedia such as video, audio, image, text and other information is also playing an increasingly important role in our daily life. As a result, the protection of video property rights has gradually become the focus of people's research. Digital watermarking 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 perceived or noticed by the human perception system. Through the information hidden in the carrier, the purpose of confirming content crea...

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Problems solved by technology

[0004] However, the development of zero watermark technology is not yet mature enough. As a complex communication medium, video is highly variable. Even if the attacker only performs slight and almost imperceptible geometric attacks on the target multimedia, such as rotation, translation, scaling, transformation, etc. ; Most watermark detectors cannot extract watermark information correctly

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