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A video watermark embedding and extraction method capable of extracting watermark after remake

A technology for video watermarking and watermarking, which is applied in digital video signal modification, image communication, electrical components, etc.

Active Publication Date: 2020-10-23
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] When these embedding methods are used in the remake scene, the watermark cannot be extracted, so they cannot be used to deal with the application scenario of extracting the watermark after the remake

Method used

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  • A video watermark embedding and extraction method capable of extracting watermark after remake
  • A video watermark embedding and extraction method capable of extracting watermark after remake
  • A video watermark embedding and extraction method capable of extracting watermark after remake

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Embodiment Construction

[0065] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0066] This embodiment provides a video watermark embedding method that can extract the watermark after the remake, the flow chart of which is as follows figure 1 shown, including the following steps:

[0067] Step 1. Read the original video file and adjust the watermark according to the read original video information;

[0068] Step 1-1. The user inputs characters or character strings as the original watermark image information;

[0069] Step 1-2. Convert each character into a single binary image information;

[0070] Step 1-3. Expand the watermark image information to the original video size, place the watermark information in the upper left corner, and set the blank part to 0;

[0071] Step 1-4. Place a watermark image symmetrical to the watermark center in the upper left corner in the lower right corner, so that the entire watermark image informa...

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Abstract

The invention discloses a video watermark embedding and extraction method capable of extracting a watermark after a remake, and belongs to the technical field of video digital watermarking. The embedding method of the present invention includes the following steps: read the original video file, adjust the watermark according to the read original video information; randomly sample the original video to determine the embedding threshold; read the frame image information of the original video frame by frame, and judge the Whether the frame needs to embed a watermark; embed the watermark; synthesize all the frames in the composite sequence into a new video at the frame rate of the original video, that is, the video with the watermark. The extraction method of the present invention includes the following steps: determining the effective area of ​​the video; determining the extraction channel; extracting the watermark from a single frame; synthesizing all the frames in the synthesis sequence into a new video according to the frame rate of the original video, that is, the extraction result. The invention can extract a clearer watermark after the remake, and takes into account the image perception; the extraction of the watermark does not require the original video, and belongs to the blind watermark method.

Description

technical field [0001] The invention belongs to the technical field of video digital watermarking, and in particular relates to a method for embedding and extracting video digital watermarks which can still realize watermark extraction after a remake. Background technique [0002] Video is now an important carrier of information transmission, one of the most effective ways of information dissemination, and an important asset for video owners. Resource pirates have many ways to illegally misappropriate video resources, one of which is remake, such as movie remake. Pirates use high-quality cameras to remake and illegally sell and make profits, which greatly damages the interests of video owners. Blind watermark technology can effectively prevent theft of video resources. At present, the methods of blind watermark embedding mainly include: [0003] The application number is CN200710068644.4, and the title of the invention is: video watermarking method based on visual features...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/467H04N19/625
CPCH04N19/467H04N19/625
Inventor 范明钰肖鸣宇王光卫刘佳雨刘文祺赵志伟许烨楠柯宇蔡政许业锁王继鹏熊洋李林杨竞
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA