Digital Image Watermarking Algorithm And System Realization

With the development of digital multimedia technology and the popularization of network technology, on the one hand, more and more consumer electronics constant ly emerging, on the other hand, People can easily unlimited upload, copy, and downloa d digital resources via the Internet. Therefore, how to more effective protection for c opyright holders are not undermined become an urgent need to address the issue. Di gital watermarking technology is the continuous development in this context.Digital watermarking information hiding technology is an important branch of, it is through will have specific meaning symbols or text into the digital products, an d watermarking information during the process of transmission is not easy to be era sed or destroyed. When there is a copyright issue, can will be extracted watermark as evidence of infringement, as evidence that a product of the copyright belongs to. In recent years, digital watermarking technology has been widely used in intellectu al property protection and information security and other fields, and have achieved r emarkable results.At present, there are a lot of algorithms for digital watermarking. For domain alg orithms, it can be faster to embed and extract watermark, but poor resistance to attack; t ransform domain-based watermarking algorithm has better invisibility and robustness, bu t there has more work to be studied against geometrical attacks. Combing the Wavele t transform (DWT) and Singular Value Decomposition (SVD) algorithm, the watermar k will has robustness and resistance to geometric attacks. The work of the paper is as fo Hows:This paper first analyzes the development status of the digital watermarking technol ogy and learns theory and performance evaluation standards for digital watermarking. It propose a improved method to combine the Wavelet transform and singular value ba sed on wavelet transform and singular value decomposition method and characteristic s; Secondly, Researching on digital watermarking and research with BMP and JPEG im ages, it experiments show that wavelet and the singular value decomposition algorith m has a good effect than DWT; Thirdly,Developing a digital watermark software b ased on the Microsoft Visual C++6.0, the software has the watermark embedding, water mark extraction, image quality evaluation and other funcations. it is easy to use and has better performance on application; Lastly, it has done hardware work on FPGA development platform for algorithm and achieve the design of the hardware device, whic h can run independently without PC.