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Compressed domain video watermark embedding and extracting methods based on moving object

A moving target and video watermarking technology, applied in digital video signal modification, image communication, selective content distribution, etc., can solve problems such as watermark damage, achieve the effects of preventing frame loss, improving robustness, and improving security

Active Publication Date: 2018-09-11
SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides a method for embedding and extracting video watermarks in compressed domain based on moving objects. After the watermarked video is re-encoded, the watermark will be damaged technically

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  • Compressed domain video watermark embedding and extracting methods based on moving object
  • Compressed domain video watermark embedding and extracting methods based on moving object
  • Compressed domain video watermark embedding and extracting methods based on moving object

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Embodiment Construction

[0036] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0037] Such as Figure 8 As shown, the compression domain video watermark embedding method based on moving object of the present invention comprises the following steps:

[0038] (1) Scrambling and encrypting the binary watermark information to obtain the encrypted binary watermark information (such as figure 1 shown);

[0039] Specifically, the scrambling encryption method used in this step ...

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Abstract

The invention discloses a compressed domain video watermark embedding method based on a moving object. The compressed domain video watermark embedding method based on the moving object is characterized by comprising the steps of: performing scrambling encryption on binary watermark information to obtain encrypted binary watermark information, obtaining a moving object labelling graph of each frameof image of a video by using a video object tracking method based on a compressed domain, obtaining a corresponding moving object in each frame of image according to the moving object labelling graph, furthermore, obtaining a corresponding motion vector from the extracted moving object in each frame of image, obtaining module values of all motion vectors of the moving object in each frame of image by calculation, and furthermore, performing cycle watermark embedding operation on the motion vector corresponding to the module value, which is greater than or equal to a pre-set threshold value inall the module values, by using the obtained binary watermark information, so that a video embedded with the watermark is obtained. By means of the compressed domain video watermark embedding and extracting methods based on the moving object disclosed by the invention, the technical problem that the watermark can be damaged after the video with the watermark is re-coded in the existing video digital watermark embedding method based on the compressed domain can be solved.

Description

technical field [0001] The invention belongs to the field of multimedia information security, and more specifically relates to a method for embedding and extracting video watermarks in compressed domains based on moving objects. Background technique [0002] With the continuous development of network technology in modern society, digital media is becoming more and more easy to be copied and spread illegally on the Internet. Especially in recent years, with the popularity of "gun version" movies, copyright issues have been faced by major film manufacturers. The most important issue, how to protect the copyright and legitimate interests of digital media authors has become a major problem to be solved in the Internet age. Video digital watermarking technology just appeared to solve this problem. [0003] In the video digital watermarking technology, many video digital watermark embedding methods have been proposed, which are mainly divided into two categories: the method based...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N21/8358H04N19/467
CPCH04N19/467H04N21/8358
Inventor 孙婧王怀江小平李聪颖李成华丁昊
Owner SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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