文档介绍：基于ARM的指纹识别门禁系统的设计
摘要
随着数字化和网络化的发展,传统的门禁系统由于鉴别方式、速度和性能等方面的限制,很难满足安全可靠和网络化的控制需求。由于识别技术的不断成熟,基于人体生理特征的身份识别系统逐渐被人们开始采用,目前,从实用的角度看,指纹识别技术要比其它生物识别技术更安全和方便,这是因为人的指纹具有唯一性、不变性以及贴身性的特点。传统的门禁控制器常采用单片机开发,利用串行通信接口向远程上位机传送数据,多个门禁控制器一般组成RS485网络,通信线路专用且不易于实现网络控制和远程控制,而基于TCP/IP网络通信的门禁系统通过局域网传递数据,很容易实现远程控制和分布式管理。
论文首先分析了门禁系统的研究背景、意义及国内外的发展现状,然后介绍
了指纹识别网络门禁系统的总体结构,阐述了系统各个重要功能模块的硬件资源。论文研究了指纹识别算法,包括指纹图像预处理和指纹图像的特征提取和匹配,重点分析了指纹图像分割法,利用灰度梯度和灰度方差的结合设置一个合适的局部阈值对指纹进行分割。然后,阐述了门禁控制系统软件的总体设计,指纹图像采集、GoAhead Web Server的应用以及系统运用TCP/IP实现系统门禁控制器和上位机PC之间的网络通信。
关键词:嵌入式,门禁,指纹识别,Linux,TCP/IP
Based on the ARM of fingerprint identification entrance guard
system design
Abstract
With the development of digitalization work,the traditional access cont- rol system is difficult to meet the reliability work control requirements because of the identification methods,speed and human physiology chara- cteristic’s status recognition is widely used based on the progress of the recognition t- present,looking from the practical angle,the fingerprint recognition technology must be safer than other physiology character recognition,this is because person’s fingerprint is unique,invariable as well as the next to the traditi- onal entrance guard controller often used the Single-
Chip puter and the ser- ial port for transmitting data to the position entrance guard pose by the work generally,it makes it’s no easy to realize work and the remote control because of munication link’s special-purpose,- working entrance guard system based on the TCP/IP is easy to realize the remote con-
trol and the distributional management.
Firstly,the paper analyzed the development of the access control system and it’s
background and significance,and then introduced the overall structure of the system,
listied the important function modules of the hardware resources and ,the paperstudied the fingerprint recognition algorithm which mainly includes the fin- gerprintima