Reversible image watermark processing method and device and computer readable storage medium

Abstract

The embodiment of the invention relates to the technical field of digital image watermarking. The invention discloses a reversible image watermark processing method. The method comprises the steps that a host image is acquired, the host image is divided into a first color and a second color according to pixels, the first color and the second color are arranged alternately, and therefore a chessboard structure related to the host image is obtained, and the chessboard structure is divided into two half planes according to the first color and the second color; watermark embedding is sequentiallyperformed on the two half planes according to a preset image algorithm; and after the watermarks of the two half planes are embedded, a carrier image containing the watermarks is obtained. According to the method, the host image is divided into the black half plane and the white half plane, and the watermark is embedded into each half plane, so that the watermark embedding capacity is improved.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of digital image watermarking, and in particular to a reversible image watermarking method, device and computer-readable storage medium. Background technique [0002] As modern society enters the Internet information age, multimedia digital carriers such as images, audio, and video have become the main media for carrying information. The requirements for digital image technology in various fields are also getting higher and higher, especially in the fields of military and medical treatment, which not only require the ability to detect whether the image content is complete, but also need to further improve the quality of authentication images and enhance the concealment of watermarks. When the image is tampered with, it can accurately locate the tampered area of ​​the image and restore it. [0003] At present, in the field of reversible digital image watermarking, a variety of image pix...

AI Technical Summary

Problems solved by technology

[0004] First of all, if the texture of the authentication image has a large difference, the pixel values ​​between adjacent pixels may have a large difference, which leads to poor accuracy of the prediction difference calculated by the average value method, and the prediction accuracy is not high. The histogram is less accurate, which eventually leads to a decrease in the quality of the watermarked image

[0005] Secondly, if the authentication image is tampered with, it is impossible to locate and recover the tampered area of ​​the image more accurately, so that the integrity of the image cannot be well authenticated

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