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| 基于FPGA的数字认证相机设计 | |
| 引用本文： | 潘晓中,罗鹏,刘方明,雷雨.基于FPGA的数字认证相机设计[J].山东大学学报(理学版),2012,47(11):59-66. |
| 作者姓名： | 潘晓中 罗鹏 刘方明 雷雨 |
| 作者单位： | 1. 武警工程大学电子技术系网络与信息安全武警部队重点实验室, 陕西 西安 710086; 2. 武警工程大学网络与信息安全研究所, 陕西 西安 710086 |
| 基金项目： | 武警工程大学基金资助项目 |
| 摘 要： | 提出了一种基于图像半脆弱水印的数字认证相机模型,并在FPGA平台上予以实现。水印算法根据图像DCT系数在JPEG压缩过程中的两个不变特性进行设计,可以抵抗一定程度的JPEG压缩,同时检测恶意篡改并定位。模型的硬件结构在DE2-70+TRDB-D5M+LTM的FPGA多媒体开发平台上进行了设计实现,水印信息可伴随图像的采集过程实时生成和嵌入,从而在图像获取的源头保证了其可认证性。 |
| 关 键 词： | 图像认证 半脆弱水印 现场可编程门阵列 可编程片上系统 数字相机 |
| 收稿时间： | 2011-11-12 |
Design of digital authentication camera based on FPGA |
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| PAN Xiao-zhong,LUO Peng,LIU Fang-ming,LEI Yu.Design of digital authentication camera based on FPGA[J].Journal of Shandong University,2012,47(11):59-66. | |
| Authors: | PAN Xiao-zhong LUO Peng LIU Fang-ming LEI Yu |
| Institution: | 1. Key Laboratory of Network ＆ Information Security under the Chinese Armed Police Force, Department of Electronic Technology, Engineering University of the Armed Police Force, Xi’an 710086, Shaanxi, China; 2. Institution of Network ＆ Information Security under Engineering University of the Armed Police Force, Xi’an 710086, Shaanxi, China |
| Abstract: | A model of digital authentication camera based on semi fragile watermarking was proposed, which is implemented on FPGA. Our watermarking algorithm was based on two invariant properties of DCT coefficients before and after JPEG compressions, resisting JPEG compression under certain quality factor. At the same time, attacks were detected and located. The hardware structure of the proposed model was designed and implemented upon the multimedia exploitation platform of DE2-70+TRDB-D5M+LTM. Watermarking is real timely generated and then inserted concomitantly with image capture, and thus authentication is guaranteed from beginning of image obtainment. |
| Keywords: | image authentication semi-fragile watermarking field programmable gate array (FPGA) system on aprogrammable chip (SOPC) digital camera |
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