Method and system for achieving zero-watermark of video based on wavelet transform and Radon transform

Abstract

The invention provides a method and a system for achieving zero-watermark of a video based on wavelet transform and Radon transform. The method comprises the steps of extracting key frames in the video, and ensuring that similarities between the key frames are minimal; transforming digital images signals in the key frames into a frequency domain from a time domain by using the discrete wavelet transform to decompose into high-frequency signals and low-frequency signals, filtering out the high-frequency signals, performing the Radon transform on the low-frequency signals after the low-frequency signals are transformed into the time domain from the frequency domain, and computing a characteristic matrix and a characteristic value according to a matrix generated by the Radon transform; encrypting a watermark image to generate a watermark cipher text; and implementing XOR processing on the watermark cipher text and the computed characteristic value, and thus forming the zero-watermark and registering the zero-watermark to an intellectual property information database. According to the method, a speed problem of an existing video zero-watermark construction algorithm can be overcome on the basis of not modifying the original video, and geometric attacks such as rotating, scaling and translating are effectively resisted while watermark robustness of the video is ensured.

Description

technical field [0001] The invention relates to the technical fields of information hiding and digital image processing, in particular to a method and system for realizing video zero watermark based on wavelet and Radon transform. Background technique [0002] At present, 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, etc.) information also plays an increasingly important role in our daily life. important role. As a result, the protection of video property rights has gradually become the focus of people's research. As a new digital watermarking technology that does not modify the original video image data, zero watermarking has attracted widespread attention. However, the development of zero watermarking technology is not yet mature enough. As a complex communication medium, video has great variability, and we still need...

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Problems solved by technology

[0005] In view of this, how to provide a video zero watermark implementation method and system, which can overcome the speed problem of the existing video zero watermark construction algorithm without modifying the original video, and effectively resist the video watermark while ensuring the robustness of the video watermark Geometric attacks such as rotation, scaling, and translation have become technical problems that need to be solved

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