Dissertation > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Pattern Recognition and devices > Image recognition device

Research on Realization of Digital Watermarking Algorithm Based on FPGA

Author XieWeiFeng
Tutor ZhangMinRui
School Xi'an University of Science and Technology
Course Signal and Information Processing
Keywords Digital Watermarking FPGA Hardware implementation DCT transform Multi-step scrambling transformation
CLC TP391.41
Type Master's thesis
Year 2009
Downloads 174
Quotes 3
Download Dissertation

The digital watermarking technology in recent years, the field of information security, the rise of a new technology , can be widely used in the field of multimedia copyright protection and image authentication . But slow image watermarking system software , can not meet the requirements of real-time processing ; hardware implementation has the speed and quickness , so the use of hardware implementation of a digital watermark algorithm has important practical value and significance . FPGA implementation of digital watermarking algorithm according to the group on the need to study and propose an FPGA-based implementation of the program ; DCT transformation of key modules of the program FPGA implementation and FPGA design and simulation verification. In this paper, to carry out the following work : (1) analysis of existing digital watermarking algorithm , proposed an improved DCT domain adaptive digital image watermarking algorithm , which uses image sub-block feature classification results of embedding strength adaptively adjusted so as to ensure the visibility of the watermark does not effectively enhance the strength of the watermark . Improved algorithm to watermark images integrated use of multi-step set scrambling transformation , to further enhance the security of the watermark . Finally, the entire experiment using MATLAB simulation, simulation results prove the correctness of this algorithm . ( 2 ) proposed a FPGA-based implementations ; proposed DCT- FPGA implementation of key modules in the program and complete FPGA design and simulation of digital watermarking algorithm for FPGA implementation technology . DCT transformation is one of the key algorithm for the design of digital watermarking scheme , DCT transform to achieve speed directly determines the speed of digital watermarking algorithm . Here , we first analyzed the DCT transform and the DCT transform to the presence of some fast algorithm for the study, and then the DCT transform hardware efficient design and simulation .

Related Dissertations
More Dissertations