Image spatial domain adaptive watermark based on JND model

An adaptive, watermarking technology, applied in image data processing, image data processing, instruments, etc., to achieve the effects of small embedding distortion, reducing embedding distortion, and improving embedding performance
CN112017094APending Publication Date: 2020-12-01江苏水印科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
江苏水印科技有限公司
Publication Date
2020-12-01

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Abstract

The invention discloses an image spatial domain adaptive watermark based on a JND model. A digital image watermark system mainly comprises two main steps of 1, determining a watermark embedding scheme; 2, the watermark embedding strength is determined, and under the condition of ensuring a certain embedding capacity, the embedding strength of the airspace watermark is adaptively determined by fully considering the relationship between the current pixel value and the adjacent pixels, so that the imperceptibility of the watermark is improved, and the embedding distortion of the image is effectively reduced. Compared with the prior art, the method considers the self-adaptive determination of the embedding intensity for different embedding areas instead of adopting the same embedding intensity, so that the imperceptibility of the watermark can be more effectively improved, and the embedding distortion is reduced. For the determination of the watermark embedding intensity, the method not only considers the current single pixel value, but also considers the relationship with the adjacent pixels. According to the invention, the embedding capacity is satisfied, the embedding strength is maximized, the embedding distortion is minimized, and the embedding performance is improved.
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Description

technical field

[0001] The invention relates to an image self-adaptive watermark technology, in particular to a space-domain self-adaptive watermark method. Background technique

[0002] With the rapid development of the Internet and multimedia technology, the dissemination and exchange of information has been accelerated. People can easily download the required digital media information through the network, and even use various editing tools to modify the original data before dissemination. It will lead to copyright disputes, content authenticity, information security and many other issues. And these problems will harm the owner's personal interests, or threaten national security. In order to protect the copyright and security of digital media, digital watermarking technology has been proposed and widely used.

[0003] Digital image watermarking technology refers to embedding watermark information into the host image, while ensuring that the embedded watermark is impercep...

Claims

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