Method and device for image watermark embedding and extraction based on quantization embedding

A technology of image watermarking and embedding watermarking, applied in image data processing, image data processing, instruments, etc., can solve problems such as low precision, small number of keys, and weak robustness

Inactive Publication Date: 2017-11-21
HENAN NORMAL UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method and device for embedding and extracting image watermarks to solve the problems of poor imperceptibility and weak robustness of existing embeddings; through further expansion and improvement, it can also solve the problem of training sample speed The problem of slowness and low precision; the problem of complex training samples; the problem of small number of keys; the problem of blind detection

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  • Method and device for image watermark embedding and extraction based on quantization embedding
  • Method and device for image watermark embedding and extraction based on quantization embedding
  • Method and device for image watermark embedding and extraction based on quantization embedding

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Embodiment Construction

[0079] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0080] The watermark embedding method of the present invention mainly includes the steps of watermark scrambling, sample training and quantization embedding. The invention mainly lies in quantization embedding, and both watermark scrambling and sample training can be carried out in a traditional way. Compared with the traditional embedding rules, quantitative embedding changes the pixel value of the original carrier image by this rule in a relatively small range, and the maximum change is d. By setting the value of d, the imperceptibility of the watermark embedding can be realized. The watermark extraction method is the reverse process of the watermark embedding method, corresponding to the watermark embedding method.

[0081] Specifically, a preferred embodiment is given below, not only the embedding step adopts the quantized embedding of the present inventi...

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Abstract

The present invention relates to a method and device for image watermark embedding and extraction based on quantization embedding. The embedding method includes a scrambling step: using Arnold transformation to process the watermark image W to obtain the embedding position in the carrier image I; the training step: In the embedded coordinate position, select k sample points, and train the k sample points through a smooth support vector machine; quantify the embedding step; compared with the traditional embedding rule, this rule changes the pixel value of the original carrier image relatively small , the maximum amount of change is d, and the imperceptibility of the watermark after embedding can be realized by setting the value of d.

Description

technical field [0001] The invention relates to a digital image watermark technology in the field of information security, in particular to an image watermark embedding and extraction method. Background technique [0002] As an effective supplement to traditional encryption methods, digital image watermarking uses data embedding methods to hide in digital image products to prove the creator's ownership of his works, and as a basis for identification and prosecution of illegal infringement. At the same time, through the detection of watermark And analysis to ensure the integrity and reliability of digital information, thus becoming an effective means of intellectual property protection and digital multimedia anti-counterfeiting, has aroused people's great attention in recent years, and has become a hot spot in international academic research. For image watermarking to play its due role, it must have two basic elements: robustness and imperceptibility. Watermark robustness me...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T1/00
Inventor 孙林徐久成张磊张幸幸张会芝
Owner HENAN NORMAL UNIV
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