Color watermark embedding and extracting method based on human eye vision characteristics

Abstract

The invention provides a color watermark embedding and extracting method based on human eye vision characteristics. According to the method, the human eye vision characteristics are sufficiently considered, carrier images are decomposed to obtain perception images and difference images, watermarks are embedded into the difference images and extracted from the difference images, and transparency, robustness, safety and the like after embedding of the watermarks are improved. The constancy of a hue is kept in the whole embedding and extracting process of the watermarks, the method solves the problem that the hue is shifted when color digit watermarks are embedded into the carrier images, and legitimate rights of intellectual property owners are furthest protected. According to the method, the constancy of H channels is kept, the watermarks are embedded into the difference images and extracted from the difference images, and the method is different from a traditional method that watermarks are embedded into three channels and extracted from the three channels in space of colors such as RGB, CIE, Lab and YUV. The method further has the advantages that calculation amount is less, calculation time is saved, use of users is facilitated and the like.

Description

technical field [0001] The invention relates to a method for embedding and extracting a digital watermark, in particular to a method for embedding and extracting a color watermark based on the visual characteristics of human eyes, and belongs to the intersecting research field of information security and digital image signal processing. Background technique [0002] With the development of science and technology and the advent of the digital information all-media era, digital image information has been widely used because of its advantages of easy storage, easy replication, and easy transmission. However, the ensuing issues of copyright protection, certification, annotation, information security, and use control are also particularly prominent, such as illegal copying, infringing use, forgery, and dissemination of digital works for profit. Whether the above problems can be effectively solved will directly determine the future development of digital products. [0003] Digita...

AI Technical Summary

Problems solved by technology

At present, the existing research mainly focuses on the embedding strategy and embedding algorithm, but ignores the influence of human visual characteristics, resulting in poor performance such as transparency, robustness, and security after watermark embedding.

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