Watermark information embedding, detection method and device

Abstract

The embodiment of the invention discloses a method for embedding watermark information, comprising the steps of: in accordance with impact degree to contents of a video or an image, branching the data of the video in the same group of images or in the image to key data and non-key data; generating the watermark information in the key data; embedding the watermark information into the non-key data. In addition, the embodiment of the invention also discloses a method and an apparatus for detection of the watermark information. The invention can branching the data of the video in the same group of images or in the image to key data and non-key data in accordance with impact degree to contents of the video and the image, and not only enlarges protective scope of the watermark information, improves protective ability of the watermark information to the video or the image, but also effectually lessens visual influence of the watermark information to the video or the image by embedding the watermark information generated in the key data into the non-key data.

Description

Technical field [0001] The present invention relates to the technical field of digital image processing and information security, in particular to a method and device for embedding and detecting watermark information. Background technique [0002] Digital watermarking technology refers to the use of signal processing methods to embed identification signals (ie watermark information) in digitized multimedia content, so as to extract these identification signals and compare whether the extracted identification signals are consistent with the embedded identification signals to achieve the Multimedia content copyright tracking, copyright declaration and content tamper-proofing and other purposes. Therefore, in the era of rapid development of digital multimedia technology, in order to prevent digital video content from being illegally tampered with, or pirated due to the portability of digital media, digital watermarking technology has a role that cannot be ignored. [0003] A digital...

AI Technical Summary

Problems solved by technology

[0005]Because the existing technology embeds the watermark information into the I frame, only the I frame is protected, but the P frame and the B frame cannot be protected, so the protection of the watermark information At the same time, since the I frame will affect the P frame and B frame during encoding, embedding the watermark information into the I frame will affect the visual quality of the entire video content, and in order to ensure the visual quality, only Reduce watermark information protection scope

[0006] It can be seen that due to the impact of watermark information embedding on video content, it is contradictory to the protection scope of watermark information embedding. If too much watermark information is embedded, it will affect the video The normal display of the content; and if the embedded watermark information is too small, the security of the video content will be reduced

At present, there is no method that can guarantee the protection range of watermark information and the visual quality of video or image at the same time.

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