| With the rapid development of multimedia and network technique,it becomes more and more convenient for people to gain digital products.But how can the authorships protect their copyright? In order to deal with these problems,a new technique entitled Digital Watermarking which could effectively protect the copyright and maintain thesecurity of digital products was proposed internationally in recent several years.Digital Watermarking is a bran-new information security technique which can realize the functions of information hiding,memory and copyright protection byembedding the sightless information into digital media.At present,Digital Watermarking has become an effective and recognized method for multimedia copyright authentication and integrity protection.This Paper introduces the basic information hiding and digital watermarking technology and the concept of digital watermarking main application areas,properties,and introduces some of the current models based on the frequeney-domain algorithms. And on this basis,to improve a digital watermarking algorithm based on wavelet transform and block singular value decomposition(SVD), the method chosen by the band had little effect on the visual image for the embedded watermark,the embedded watermark image better transparency. Experiments demonstrate that the proposed scheme is valid,invisible and robust against common image processing. |
