Research On The Algorithm Of Digital Watermark Based On Transformation Domain

With the rapid development of computer and network, the daily life and work of human beings are becoming digitalized and networked. A large number of private data are transformed in the Internet, and electrical commerce is more and more popular. All these challenge the traditional method of copyright protection and technology of data security. In this background, digital watermarking is developed gradually. Digital watermarking technique is an effective protection technique, which embeds copyright information into multimedia products in order to authenticate the ownership or transmit to the available information.This technique can be traced back to as far as early 1990's. Since then, it has drawn extensive attention from both academic and commercial communities. In 1994, Van Schyndel published the paper"A digital watermark"at ICIP'94. this paper is also based on special domain, since then several arithmetic had been put forward based on that domain, but based on this domain, the quantity of watermark can not be controlled well and they are not robust methods, so people gradually embed and detect watermark base on transformation domain. So the digital...