基于FPGA的JPEG图像数字水印系统  

JPEG Image Digital Watermarking System Based on FPGA

作　　者：陈鑫[1] 石东 张颖[1] CHEN Xin;SHI Dong;ZHANG Ying(College of Electronic and Information Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China)

机构地区：[1]南京航空航天大学电子信息工程学院,南京211106

出　　处：《数据采集与处理》2022年第1期240-246,共7页Journal of Data Acquisition and Processing

基　　金：模拟集成电路重点实验室基金(61428020304);国家自然科学基金(61106029,61701228);航空科学基金(20180852005)。

摘　　要：设计了一种基于FPGA的JPEG压缩域数字水印系统,可在JPEG图像中实时嵌入水印信息。在对水印信息作二值化和Arnold置乱预处理后,通过改进的LSB嵌入算法将水印信息嵌入到量化后的DCT系数中,经熵编码后生成JPEG压缩文件,完成JPEG压缩域的数字水印嵌入。最后,采用FPGA开发板和上位机对本文设计进行软硬件联合测试。测试结果验证了本文提出的嵌入算法具有较好的不可见性和鲁棒性,以及较高的数据吞吐率。This paper designs a JPEG compressed domain digital watermarking system based on FPGA,realizing the real-time embedding of watermark information in JPEG image.After watermarking information is preprocessed by binary and Arnold transform,watermark is embedded into the quantized DCT coefficients with improved LSB embedding algorithm.Then,to complete the JPEG compressed domain digital watermark embedding,the modified DCT coefficients are processed by entropy coding process,and JPEG encoding file is generated.Finally,the design is implemented and tested by the joint system of FPGA develop board and host computer.The results show that the proposed algorithm has a good performance of invisible effect and robustness,and a high throughput.

关 键 词：数字水印 JPEG图像编码 LSB算法 

分 类 号：TN47[电子电信—微电子学与固体电子学]