Digital watermarking device

Abstract

With the recent rapid growth of networked multimedia systems, digital watermarking techniques have widely been used in high security documents and for integrity checking. Digital watermarking is a technique to add hidden copyright notices or secret messages to digital audio, video, or image forms. This project was divided into two parts. In the first part, two watermarking algorithms "A novel image-hiding scheme based on block difference" and "Data Hiding in Images by Adaptive LSB Substitution Based on the Pixel-Value Differencing" have been studied and implemented on software. These two algorithms are both lossless image hiding techniques and produce good image quality of the stego-image. In the second part, FPGA was used to implement digital watermarking techniques with the video signal. Furthermore, Visual C#.net and Verilog HDL have been used to implement this project.