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

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.

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...

AI Technical Summary

Problems solved by technology

[0006] The present invention proposes a zero-watermark embedding and extraction method and device based on DWT and principal component analysis compression to solve the problems of existing digital watermark methods such as difficulty in watermark detection and extraction, complicated detection process, and poor robustness.

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