基于摄像头的条码识别技术的研究及实现

摘 要

随着时代的发展，21世纪已经成为信息时代，科学技术得到了空前的进步。由于大量的生产生活的需要，自动识别技术应运而生，从个个方面影响了人们的生活生产方式，对人们带来了极大便利。二维码技术由于信息容量大、操作方面、保密性高等优点而逐渐被各行各业广泛使用。在此背景之下，本文将对摄像头的条码识别技术进行深入研究。

本文主要分为三个部分来对条码识别进行讨论。第一部分，介绍了本课题的研究背景，以及国内外关于条码研究的进展。第二部分，介绍了条码技术相关知识。具体包括一维条码介绍、二维条码介绍以及二维条码的编码规范。第三部分，详细介绍了二维条形码的识别装置设计。分别从二维码识读原理、CMOS图像传感器的介绍入手，然后就基于OV7640的二维码识别装置做了详细介绍。

关键词 摄像头识别 条码识别 CMOS图像传感器

Research and realization of barcode

recognition technology based on camera

ABSTRACT

With the development of The Times, the 21st century has become an information age, and science and technology have made unprecedented progress. Due to the large quantity of production and daily life needs, automatic identification technology emerges at the right moment, which has brought great convenience to people from all aspects of impact and people's life and production mode. The 2d barcode technology is widely used in all walks of life due to its advantages such as large information capacity, operation aspect, high privacy and so on. In this context, this paper will carry out in-depth research on the camera bar code identification technology.

This paper is divided into three parts to discuss bar code identification. The first part introduces the research background of this subject and the progress of barcode research at home and abroad. The second part introduces the knowledge of barcode technology. It includes one-dimensional barcode introduction, 2d barcode introduction and 2d barcode coding specification. The third part introduces the design of the identification device of 2d barcode. This paper starts with the introduction of two-dimensional code reading principle and CMOS image sensor, and then makes a detailed introduction based on the two-dimensional code recognition device of OV7640.

Key words：Camera identification；Bar code identification；CMOS image sensor

目录

1 绪 论............................................................................................................................................. 4

1.1 研究背景 ........................................................................................................................... 4 1.2 条码技术的国内外发展及现状 ....................................................................................... 4

1.2.1 国外发展与现状 ................................................................................................... 4 1.2.2 国内发展与现状 ................................................................................................... 5

2 条码技术相关知识 ....................................................................................................................... 5

2.1 一维条码 ........................................................................................................................... 5 2.2 二维条码 ........................................................................................................................... 6 3 二维码识别系统设计 ................................................................................................................... 6

3.1二维码识别基本原理 ........................................................................................................ 6 3.2二维码识别系统结构图 .................................................................................................... 7 3.3摄像头 ................................................................................................................................ 7

3.3.1 摄像头的基本构成 ............................................................................................... 7 3.3.2 摄像头的基本原理 ............................................................................................... 8 3.3.3 CMOS摄像头模块 .................................................................................................. 8 3.4二维码扫描器传感器CMOS ............................................................................................. 10

3.4.1 CMOS基本介绍 .................................................................................................... 10 3.4.2 CMOS工作原理 .................................................................................................... 10 3.5 A/D转换器 ...................................................................................................................... 11

3.5.1 ADC0809模数转换器 .......................................................................................... 11 3.5.2 ADC0809模数转换器工作过程 .......................................................................... 11 3.6二维码解码器 .................................................................................................................. 12

3.6.1解码器的基本概念 .............................................................................................. 12 3.6.2单片机AT89C52的简介 ...................................................................................... 12 3.6.3单片机AT89C52电路图及译码 .......................................................................... 13 3.7单片机AT89C52与计算机的串行口连接 ...................................................................... 14 4 总 结........................................................................................................................................... 17 参考文献......................................................................................................................................... …… 此处隐藏：6049字，全部文档内容请下载后查看。喜欢就下载吧 ……