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Reversible information hiding method and system for enhancing image smoothness

A technology for image enhancement and information hiding, applied in the field of information security, can solve the problem that the image smoothing algorithm cannot apply reversible information hiding, etc., and achieve the effect of good visual quality, high embedding rate, and visual quality improvement.

Active Publication Date: 2021-12-07
XIDIAN UNIV
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Problems solved by technology

[0013] Aiming at the problems existing in the prior art, the present invention provides a reversible information hiding method and system for enhancing image smoothness, aiming to solve the problem that existing image smoothing algorithms cannot be applied to reversible information hiding

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  • Reversible information hiding method and system for enhancing image smoothness

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Embodiment 1

[0125] The reversible information hiding method for enhancing image smoothness of the present invention accepts the carrier image of Figure 5(a) of 512×512 size and the secret information expressed in 2048-bit binary, and outputs the enhanced image smoothness of Figure 5(c) of 512×512 size degree of secret-carrying image, accept the secret-carrying image, output 2048-bit binary secret information and the carrier image in Figure 5(a), including three stages:

[0126] (1) In the preprocessing stage, select the 2048-bit binary secret information m to be embedded, the carrier image O(x, y) of size 512×512, and the Gaussian filter kernel of the auxiliary smoothing image, where the Gaussian filter kernel uses the filter kernel σ=0.5 Parameter generation, dividing the carrier image area, the inner area of ​​510×510 size is non-reference pixels, and the rest of the positions are reference pixels; according to the size of the carrier image, generate a location map LM with the same size ...

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Abstract

The invention belongs to the technical field of information security, and discloses a reversible information hiding method and system for enhancing image smoothness, wherein the method comprises the steps of receiving a carrier image and secret information, outputting a secret carrying image for enhancing the image smoothness, receiving the carrier image, and outputting the secret information and the lossless recovered carrier image. The method comprises a preprocessing stage, an information embedding and image smoothing stage and an information extraction and image restoration stage. According to the method, a Gaussian filtering algorithm in an image smoothing technology is combined with a reversible information hiding algorithm, Gaussian filtering is used as a template for pixel value modification when secret information is embedded, a difference value between a predicted value and an original pixel value is used as a condition for judging embedding, and meanwhile, the filtering difference value is added into a carrier image in a lossless manner, so that the image smoothing effect is achieved. It is ensured that the carrier image distortion rate is maintained, meanwhile, the visual quality is well improved, and the high embedding rate and the short processing time consumption are obtained.

Description

technical field [0001] The invention belongs to the technical field of information security, and in particular relates to a reversible information hiding method and system for enhancing image smoothness. Background technique [0002] At present, with the development of Internet technology and the popularity of social networks, reversible information hiding is widely used in the field of covert transmission. Different from traditional information hiding techniques, reversible information hiding can hide secret data in the carrier while ensuring that the carrier data does not lose data. Researchers often use Peak signal to noise ratio (PSNR) to evaluate the distortion rate of the secret image compared with the cover image. A high PSNR proves that the quality of the secret image is better, the distortion rate is lower, and the performance of the algorithm better. Many current algorithms pay too much attention to how to obtain low PSNR so as to reduce the distortion of the cov...

Claims

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Application Information

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IPC IPC(8): H04N1/32H04N1/44
CPCH04N1/32149H04N1/44
Inventor 朱辉王婧晗李晖杨晓鹏李鹤麟
Owner XIDIAN UNIV
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