Video authentication method and device

An authentication method and video technology, applied in the field of communication information security, can solve problems such as the complexity of digital watermarking algorithm, the inability of perceptual hash technology to locate tampering, and the impact on video image quality

Active Publication Date: 2015-04-29
深圳科卫机器人科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a video authentication method and device to overcome the problems in the related art that the perceptual hash technology cannot locate the tampered position, the algorithm of the digital watermark technology is complicated, and the quality of the video image is affected

Method used

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  • Video authentication method and device

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Embodiment 1

[0070] Such as figure 2 Shown is an exemplary flowchart of a method for video authentication in an embodiment of the present invention, the method includes the following steps:

[0071] Step 201: Generate a hash code to be authenticated of the video to be authenticated, and obtain a reference hash code of the original video of the video to be authenticated, the hash code to be authenticated includes: for each frame of the video to be authenticated, the The hash code of each preset area obtained by dividing the image area of ​​the frame image, and the position information indicating the position of each preset area in the frame image; the generation algorithm of the reference hash code is the same as the The algorithm for generating hash codes to be authenticated is the same as described above.

[0072] Wherein, the scene image is used to characterize the characteristics of the background image of the video. In one frame of image, it is divided into a background image and a m...

Embodiment 2

[0177] Taking the video authentication of the surveillance video as an example below, since the scene image of the surveillance video is relatively stable, at least one scene image may be established to represent the scene image of the surveillance video. Corresponding to the scene image of the surveillance video, the perceptual hash feature extraction of each block can be performed by pre-blocking and performing DCT transformation on each block, and the perceptual hash feature extraction of each block is composed of 1 DC coefficient and 5 AC coefficients. The characteristic coefficient matrix, and then obtain the block hash code of each block through multi-interval non-uniform quantization. Since the moving target image in the surveillance video accounts for a small proportion of the entire frame image, each target image can be used as a unit, and the 7 Hu moments obtained for each target image are used as the characteristic coefficient matrix of the moving target image, and t...

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Abstract

The invention provides a video authentication method and device. The method comprises the following steps: generating a hash code to be authenticated of a video to be authenticated, and obtaining a reference hash code of an original video of the video to be authenticated, wherein the hash code to be authenticated comprises each frame image for the video to be authenticated, a hash code of each preset region obtained by dividing the image region of the frame image and position information representing the position of each preset region in the frame image, and the generating algorithm of the reference hash code is the same with the generating algorithm of the hash code to be authenticated; for the hash code of each preset region, when the hash code of the preset region is not matched with the hash code of the corresponding preset region in the original video, determining that the preset region is tampered, and determining the tampered position of the video to be authenticated according to the position information of the preset region. The method can improve the robustness of video authentication and accurately position the tampered position.

Description

technical field [0001] The invention relates to the technical field of communication information security, in particular to a video authentication method and device. Background technique [0002] Videos are generally transmitted to users through public transmission channels. During the transmission process, videos may be maliciously tampered with, for example, frames are deleted, frames are rearranged, or the content in frame images is modified. When the video involves public security, politics, military or court evidence, the credibility of the video must be evaluated, thus the video authentication technology is produced. Video authentication technology is a key technology in the video information security evaluation and early warning system. Through the processing of video content, this technology generates an identifiable mark, and through this mark, the security authentication of video content is realized. The current video authentication is mainly realized by digital w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N21/835
CPCH04N21/2347H04N21/835G06V10/40
Inventor 孙威吴金勇王军
Owner 深圳科卫机器人科技有限公司
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