The Design And Realization Of Digital Watermarking System Based On C#

Nowadays, many businessmen are going to protect their identities, addresses,routings and other privacies not be leaked. They are using digital watermarkingtechnology to help customers realize anonymous payment, anonymous communication,anonymous signatures, anonymous election, et al. On the other hand, there are somebusinessmen and authors in order to conceal the author or copyright information, theyusually attache marks to represent the ownerships of digital objects. These marksusually are digital watermarks, digital fingerprints, product serial numbers and so on.As soon as these products or works have been found copied illegally by criminals, wecould figure out which customers’ products have been copied with the help of thehidden tags. As more and more digital watermarking technology has been widely used,the research on digital watermarking technology is also increasing.The research on digital watermarking algorithm can be divided into two categories:one is based on spatial domain, mainly includes LSB algorithm, Patchwork algorithm,document trimming algorithm etc. The other is based on frequency domain, such as inDFT domain, DCT domain and DWT domain. In the actual applications, in order to getmore safety, more robustness digital watermarking, we often confuse a variety ofwatermarking algorithm or scrambling encryption technology in watermarking algorithm.This paper is based on the research of various watermarking technologies, andtry to achieve a application program which contains a variety of digital watermarkingalgorithms based on C#programming language and.NET platform. In spatial domain,users can perform digital watermark embedding and detection by using LSB chaosalgorithm and Patchwork algorithm, and perform watermark embedding andextracting through using LSB algorithm. In frequency domain, we can processembedding and detection operations for spread spectrum watermark, and processembedding and extraction operations for digital watermarks in DM and DWT domain.In the experiment, we perform the JPEG compression for the image which has beenembedded watermark to detect the robustness of the embedding algorithm.