Adaptive image watermark embedding method and system and extraction method and system

Abstract

The invention relates to a texture-based adaptive image watermark embedding method, a texture-based adaptive image watermark embedding system, a texture-based adaptive image watermark extracting method and a texture-based adaptive image watermark extracting system. The adaptive image watermark embedding method comprises the following steps: determining a watermark embedding area in a carrier imageinto which a watermark is to be embedded, the watermark embedding area being a plurality of non-overlapping texture rough areas; utilizing a multiple regression analysis method to establish a texture-based adaptive parameter adjustment model for adjusting embedding parameters in the watermark embedding method; and embedding a watermark into each watermark embedding region by using the watermark embedding method. According to the invention, the richness of image textures can be truly measured; accurately positioning a texture rough area in the image; through multiple regression analysis, a function relationship between a watermark embedding parameter and a global texture value and a local texture value of a texture rough region is established, and the watermark embedding parameter is adaptively adjusted according to the texture value of the region, so that the invisibility of the watermark is ensured to the greatest extent, and the robustness of the watermark is enhanced.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a texture-based adaptive image watermark embedding method and system, and an extraction method and system. Background technique [0002] With the rapid development of computer, Internet and digital media technology, various types of digital media content such as text, image, audio and video are widely used and disseminated on the network and different mobile devices. People can use digital equipment to produce, process, modify and store these digital media contents conveniently and quickly, but at the same time, it has also caused serious network copyright issues. In recent years, more and more online piracy and infringements have caused a great impact on the interests of right owners, and combating online piracy and infringements has increasingly become a common concern in all walks of life. Therefore, it is imminent to be able to effectively identify copyright violati...

AI Technical Summary

Problems solved by technology

Although the adaptive watermark embedding method takes into account the invisibility of the watermark, since these characteristics are not directly related to the invisibility of the watermark, and the image features that affect the invisibility of the watermark in the image are diverse, they are difficult to consider in every aspect, so The existing adaptive watermark embedding method only weakens the difference between the invisibility of each image, while improving the robustness of the watermark, it still cannot make all the images embedded with the watermark have consistent and good watermark invisibility

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