嵌入式条码识别系统的算法、编程与实现

发布时间：2018-04-24 07:49

本文选题：条码识别 + 一维条码　；参考：《电子科技大学》2014年硕士论文

【摘要】：条码技术的基础是机器视觉或机器识读技术,其目的是读取一维条码或二维条码图像中的符号信息。条码技术被广泛应用于诸多领域,包括生产线的管理、物流供应链的管理、电子商务、POS机等,到处能见到条码识别系统的身影。在众多条码识别技术中,目前一维条码识别技术实为佼佼者,应用最为广泛。一维条码图像从外观来看是一串黑白相间、粗细不同的“条”和“空“,实质上这些条空反射率不同,并按照规定的编码规则组成,其码制为二进制。一维条码图像可通过激光脉冲扫描器、摄像头、平板扫描仪等装置来获取,采集后的图像被传送到PC机或嵌入式系统的处理器中,完成处理和解码,提取出符合某种编码规则的条码字符信息,完成自动识别的过程。本文针对一维条码技术展开研究,为了达到小型化的目的,采用流行的嵌入式系统设计方法,对条码识别中的相应算法做了详细研究,并以ARM处理器为核心,实现了包括信号采集、数据处理和显示单元的一维条码识别系统。本文主要包括以下内容:(1)、对条码技术的起源和现状做了分析与阐述;(2)、对一维条码及其识别系统的基本概念与原理进行了较为详实的介绍;(3)、根据嵌入式系统的设计理念,提出了软硬件划分原则,对系统设计的思路与架构进行了研究;(4)、详细研究了应用于条码识别的算法和编程方法,包括:数字滤波算法,图形预处理的相应算法,边沿检测算法。根据算法,实现了相应数字信号处理以及译码的编程工作,并完成了算法基于ARM处理器的软件移植;(5)、研究了基于ARM处理器的硬件电路设计,并进行了相应的仿真工作;(6)、基于开发的平台,进行了相应的测试与实验,达到了预定的技术指标。
[Abstract]:The technology of barcode is based on machine vision or machine reading technology, whose purpose is to read the symbol information in one dimension bar code or two dimensional bar code image. Bar code technology has been widely used in many fields, including production line management, logistics supply chain management, electronic commerce POS machines, bar code recognition system can be seen everywhere. Among the many bar code recognition techniques, one-dimensional bar code recognition technology is the best and most widely used. The one-dimensional barcode image is a series of black and white phase with different thickness "strip" and "empty". In fact, the reflectivity of these strips is different, and the code system is binary according to the prescribed coding rules. One-dimensional barcode images can be obtained by laser pulse scanner, camera, flat scanner and so on. The collected images are transmitted to the processor of PC or embedded system to complete processing and decoding. The bar code character information which conforms to some coding rules is extracted and the process of automatic recognition is completed. In order to achieve the goal of miniaturization, this paper makes a detailed study on the corresponding algorithms in bar code recognition using popular embedded system design methods, and takes the ARM processor as the core, in order to achieve the miniaturization of the one-dimensional barcode technology. A one-dimensional bar code recognition system including signal acquisition, data processing and display unit is implemented. This paper mainly includes the following contents: the origin and present situation of barcode technology are analyzed and expounded, and the basic concepts and principles of one-dimensional bar code and its recognition system are introduced in detail, according to the design idea of embedded system, The principle of hardware and software partition is put forward, and the idea and framework of system design are studied. The algorithms and programming methods applied to bar code recognition are studied in detail, including digital filtering algorithm, corresponding algorithm of graph preprocessing and edge detection algorithm. According to the algorithm, the corresponding programming work of digital signal processing and decoding is realized, and the software transplantation of the algorithm based on ARM processor is completed. The hardware circuit design based on ARM processor is studied. The corresponding simulation work is carried out. Based on the developed platform, the corresponding tests and experiments are carried out, and the predetermined technical specifications are achieved.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TP391.44

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