An Adaptive Reversible Information Hiding Method Based on Integer Wavelet Transform

Abstract

The invention discloses an adaptive reversible information hiding method based on integer wavelet transform, which belongs to the field of digital watermarking and information hiding. The method of the invention first divides the carrier image into two areas: the watermark embedding area and the additional information embedding area; the watermark embedding area Integer wavelet transform is performed on the area, and the threshold value is adaptively set by using the watermark size and the mean square error of the wavelet coefficient; it is determined whether an image block is embedded according to the approximate component, and then the watermark information is embedded into the corresponding diagonal component; the additional information embedding area is used for embedding Additional information, including thresholds, length and width of the watermark. The invention can realize self-adaptive watermark embedding and complete blind extraction; the method can not only realize reversible information hiding, but also has better visual effect, less distortion, high PSNR of the image after embedding the watermark, and no watermark Good visibility and practical value.

Description

Technical field[0001]The invention belongs to the field of digital watermarking and information hiding, and specifically relates to an adaptive reversible information hiding method based on integer wavelet transform.Background technique[0002]With the improvement of people's security awareness and intellectual property awareness, people pay more and more attention to the security of their own information, and the use of information hiding and digital watermarking technology is increasing. Reversible watermarking is an important branch of information hiding technology. This is of great significance for the copyright protection of digital carrier data (such as audio, video, and image) and the prevention of tampering and forgery. Different from traditional watermarks, the complete reversibility and concealment of reversible watermarks play an important role in certain sensitive fields (such as medical images, military satellite images and legal evidence verification). If there is an err...

AI Technical Summary

Problems solved by technology

If there is an error between the original image and the image after extracting the watermark, it will cause irreparable loss

[0003] The literature "Xiong L, Xu Z, Shi Y Q. An integer wavelet transform based scheme for reversible data hiding in encrypted images" (International Conference on Information Science & Technology. IEEE, 2012) proposed an autoregressive adaptive reversible data hiding method, the The algorithm adaptively sets a threshold for different images, which is used to divide the image into smooth areas and texture areas, and obtains the prediction of pixel values ​​through the least square method, but because it uses spatial domain embedding, its robustness is not good

The watermark embedding method of the document "Li F, Mao Q, Chang C C. Reversible data hiding scheme based on the Haardiscrete wavelet transform and interleaving prediction method" (MultimediaTools and Applications, 2017, 77: (8) 1-20.) is The algorithm based on discrete wavelet transform and interleaving prediction has good visual effect, but the algorithm cannot be completely reversible due to the small numbers generated by discrete wavelet transform

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