Zero watermark embedding and extraction method and device based on dwt and principal component analysis compression

A technology of principal component analysis and extraction method, which is applied in the direction of instrumentation, calculation, image data processing, etc., and can solve problems such as complex detection process, difficult watermark detection and extraction, poor robustness, etc.

CN106023056BInactive Publication Date: 2019-08-16HENAN NORMAL UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2019-08-16
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention relates to a zero watermark embedding and extraction method and device based on DWT and principal component analysis compression. When embedding a watermark, an improved Arnold transform is used to transform the original watermark, and then discrete wavelet transform and principal component analysis compression are used to obtain Compress the image, and then perform an XOR operation on the compressed image and the scrambled watermark image to obtain a feature matrix. When extracting the watermark, the discrete wavelet transform is first performed on the carrier image containing zero watermark, and then the low-frequency sub-band image is compressed using the principal component analysis compression method, and the obtained matrix and the characteristic matrix are XORed to obtain the scrambling After the watermarked image, and then use the inverse Arnold transformation formula to get the original watermarked image. The method and device of the invention not only make the construction and extraction of the zero watermark easy to realize, but also effectively improve the security and anti-attack ability of the watermark.
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Description

technical field

[0001] The invention belongs to the technical field of image processing, and in particular relates to a zero-watermark embedding method, extraction method and device based on DWT and principal component analysis and compression. Background technique

[0002] As an effective supplement to traditional encryption methods, digital image watermarks use data embedding methods to hide in digital image products to prove the creator's ownership of their works, and serve as the basis for identification and prosecution of illegal infringement. It has become an effective means of intellectual property protection and digital multimedia anti-counterfeiting to ensure the integrity and reliability of digital information. At the same time, digital image scrambling and encryption is the basic work of using information hiding technology for covert communication. As a preprocessing method before information hiding, digital image scrambling and encryption can not only encrypt inf...

Examples

Embodiment Construction

[0098] The technical solution of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0099] The methods used in the present invention mainly include: watermark scrambling, discrete wavelet transform (DWT), principal component analysis and compression. The point of the invention lies in the improvement of the Arnold transform, which increases the coefficient β and uses the construction idea of ​​discrete standard mapping to increase f(x 0 ) combination of the two, and use the idea of ​​principal component analysis compression to obtain the feature matrix of the carrier image, and then perform an XOR operation on the carrier feature matrix and the scrambled watermark image to obtain another feature matrix for blind watermarking Extract and use this algorithm to construct a zero watermark, which completely realizes the imperceptibility of the watermark image.

[0100] Embodiment of the zero watermark embedding method b...