Zero-watermark insertion and extraction methods with multiple keys for digital images

Abstract

The invention discloses zero-watermark insertion and extraction methods with multiple keys for digital images. The insertion method includes constructing multiple watermark keys from different feature information of original digital images, combining the multiple watermark keys with actual digital watermarks to be inserted respectively to form multiple zero-watermark information, and registering the multiple zero-watermark information to a digital watermark information database. The extraction method includes constructing multiple watermark keys from different feature information of digital images to be measured and achieving extraction through combination of the multiple zero-watermark information. According to the zero-watermark insertion and extraction methods, inserted digital watermarks are enabled to be under multiple protection, safety of the digital watermarks is effectively improved, quality of the original digital images is not reduced, simultaneously, features of various transform domains are fully combined and utilized, digital watermark insertion and extraction methods which can resist conventional image processing attacks and have superior robust performance are achieved, and therefore, contradiction between robustness and imperceptibility of the digital watermarks is balanced.

Description

technical field [0001] The invention relates to a digital watermark technology in the field of information security, in particular to a digital image zero watermark embedding and extraction method with multiple keys. Background technique [0002] With the rapid development of computer network and multimedia technology, the storage, transmission and processing of digital media such as digital images, digital audio, and digital video have become more frequent and convenient, which has promoted the sharing of human information and promoted The progress of society has been promoted, but the problems of digital media security, copyright protection and content certification have become increasingly prominent. As a current research hotspot in the field of digital media information security, digital watermarking technology has been widely used in the copyright protection and content authentication of digital media products. Some or several characteristic information such as signatu...

AI Technical Summary

Problems solved by technology

More importantly, once the single watermark key is cracked, illegal users can delete the actual digital watermark embedded in the digital media product, making it return to the state of no copyright protection, so as to arbitrarily copy, Modification and retransmission; In addition, digital media products can be taken as their own by tampering with watermark keys and actual digital watermarks, which will seriously infringe the interests of authors and copyright owners

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