2005年Nios 软核心嵌入式处理器设计大赛 Nios II Soft Core-Based Double-Layer Digital Watermark Technology Implementation Third Prize Nios II Soft Core-Based Double-Layer Digital Watermark Technology Implementation System Institution: China University of Science and Technology Participants: Lian Jiezhen and Ye Qingfeng Instructor: Liang Xiaowen and Li Yuhu Design Introduction With increasingly powerful functions available from digital imaging software, the reliability and authentication features of digital images are gradually decreasing. Therefore, reliability and authentication are important for a wide range of digital image applications. Digital watermarking provides digital copyright protection, ensures integrity, and assists during digital transmission. The technology guarantees……