基于FPGA的数字认证相机设计

J4 ›› 2012, Vol. 47 ›› Issue (11): 59-66.

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Design of digital authentication camera based on FPGA

PAN Xiao-zhong1, 2, LUO Peng1, LIU Fang-ming1, LEI Yu1

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

Received:2011-11-12 Online:2012-11-20 Published:2012-11-26

Abstract

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.

Key words: image authentication; semi-fragile watermarking; field programmable gate array (FPGA); system on a programmable chip (SOPC); digital camera

PAN Xiao-zhong1, 2, LUO Peng1, LIU Fang-ming1, LEI Yu1. Design of digital authentication camera based on FPGA[J].J4, 2012, 47(11): 59-66.