Zero-watermark embedding and extracting methods and zero-watermark embedding and extracting devices based on DWT and principal component analysis (PCA) compression

Abstract

The invention relates to zero-watermarking embedding and extracting methods and zero-watermarking embedding and extracting devices based on DWT and PCA compression. When a watermark is embedded, improved Arnold transformation is used to transform an original watermark; a compression image is obtained by using wavelet transformation and PCA compression methods; and XOR operation is carried out on the compression image and a scrambled watermark image to obtain a characteristic matrix. When the watermark is extracted, discrete wavelet transformation is carried out on a carrier image with zero-watermark, the PCA compression method is used to compress a low-frequency sub-band image, XOR operation is carried out on the obtained matrix and the characteristic matrix, the scrambled watermark image is obtained, and a reverse Arnold transformation formula is used to obtain the original watermark image. According to the method and device of the invention, zero watermark is easy to construct and extract, and the safety and anti-attack capability of the watermark are improved effectively.

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 compression. 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. At the same time, digital image scrambling and encryption is the basic work of using i...

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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