Self-adaptive reversible information hiding method based on integer wavelet transform

Abstract

The invention discloses a self-adaptive reversible information hiding method based on integer wavelet transform, and belongs to the field of digital watermarking and information hiding. The self-adaptive reversible information hiding method comprises the following steps: firstly, dividing a carrier image into two areas, namely a watermark embedding area and an additional information embedding area; performing integer wavelet transform on the watermark embedding area, and adaptively setting a threshold by utilizing the watermark size and the mean square error of a wavelet coefficient; and determining whether a certain image block is embedded or not according to the approximate component, and then embedding the watermark information into the corresponding diagonal component, wherein the additional information embedding area is used for embedding additional information including a threshold value and the length and width of the watermark. According to the self-adaptive reversible information hiding method, self-adaptive watermark embedding can be realized, and complete blind extraction can be realized; and reversible information hiding can be achieved, and the visual effect is good, and the distortion degree is small, and the PSNR of the image embedded with the watermark is high, and the invisibility of the watermark is good, and the practical value is achieved.

Description

technical field [0001] The invention belongs to the field of digital watermarking and information hiding, and in particular 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 also 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 images), preventing tampering and forgery, etc. Different from traditional watermarking, the complete reversibility and concealment of reversible watermarking play an important role in some sensitive fields such as medical images, military satellite images and legal evidence verification. I...

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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