Research On Embedded Digital Watermarking Based On DSP

Digital watermarking belongs to Information Hiding, and it is the vivid apply of this file.it embed some specific significance to many multi-media files by the Embedded Algorithm,in this way,the author could prove the ownership of the work and could get the evidence when facing a copyright case.In the recent years,digital watermarking in audio-visual products, paper anti-counterfeiting, patent applications have been used, but the technology is not mature till now. With the development of digital technology and Internet,and the urgent need for digital product copyright protection, makes the watermark robustness algorithm research extremely important.And it will be a new trend for the development of digital watermarking technology.To research the watermarking algorithm what could resist geometric attacks,and realize it on the DSP hardware platform.This process has higher theoretical significance and practical value.This system starts work around this issue, involved in the following several aspects:1. Starting from the digital watermarking technology research in and out of our country, explained the summary content of information hiding, analyzed the related watermark model and algorithm, and introduced the basic characteristics and application field of digital watermarking.2. To analysis algorithm model at the point of system structure and technical analysis,according to the analysis and comparison,selected the L component of CIEL*a*b*Color space,maked3level DWT transformation on the color carrier images.After that,embedded the binary image to the Singular matrix.3. Combined with the features of DSP chip system,selected ICETEK DM642-C evaluation board as the hardware environment of this system,collected the Image with watermark by ICETEK DM642-C evaluation boar which has been printed.Then extract the watermark information,passed the it to Matlab through a serial port.Matlab could evalue the image information through its powerful image processing functions. 4. To imitate several kinds of attacks on Matlab and extract the watermark information,then disadvantages the watermarking algorithm by PSNR and NC.5. Based on this algorithm, concluded by the experimental results of different kinds of attacks,to explore the advantage and disadvantages of this algorithm. Explored marketization and transition of this system with the prospects for development of Digital watermarking field. And finished the summary last.