【作者】 向君；

【导师】 苑玮琦；

【作者基本信息】 沈阳工业大学 ， 检测技术及自动化装置， 2004， 硕士

【摘要】 随着自动化技术的日益普及，使用字符识别技术的场所也就越来越多。如各种无人售票机、自动售货机、自动售卡机、纸币的字符识别、车牌号的识别等。本文主要研究对象针对的是纸币的字符识别。随着我国金融业的日益发展和成熟，国内各大商业银行都开展了外币储蓄业务，但在业务中如何鉴别假币和超级假币，始终是金融界头疼的一个问题。为了减少银行损失，在纸币入库前可以登记纸币的号码，一旦入库时发现假币，将有据可查，并且一旦货币丢失也将对于立案侦查提供线索。 本文设计了基于DSP芯片TMS320VC5410的字符识别系统并完成了部分功能模块的调试工作。本系统采用了以DSP、MCU(微控制器)、CPLD(复杂可编程逻辑器件)为核心的硬件结构，完成了字符识别系统的硬件平台。利用Philips公司的SAA7113集成的视频解码芯片完成模拟图像到数字图像的转换合同步信号的分解。完成了从摄像头输入的视频信号中采集数字图像并对其进行处理的过程。在通信方面，采用USB接口实现与PC的数据通信。最后将通过验证的字符识别算法嵌入到DSP器件中完成系统的脱机实现。 本文侧重于字符识别系统的硬件平台的设计。文中首先讲述了系统设计的整体思路。然后分章节讲述各个模块设计的技术细节。文章最后提到了硬件调试过程中遇到的一些问题和解决问题的办法，并为系统进一步优化提出了建议。本文为采用DSP构成字符识别系统提供了一些有价值的参考。更多还原

【Abstract】 With the popularization of automatic technology, the site of using the code identifying technology is more popular. For example a kind of automat, identifying code of currency, identifying code of vehicle mark. The cental researchful object of the paper is the identification of currency code. With development and finishment of financial market in our country, the internal commercial bank developed the savings operation of foreign currency, but differentiation of the fake currency and trust currency is the more troublesome problem of finance field. The code of the currency is registered to decrease the toss of the bank before the currency is loched in the casebox of the bank. When the fake currency is found, we have attestation to investigate, and when the currency is lose, this will offer the clue to crack the criminal case.In this paper, code identifying system based on DSP chip TMS320VC5410 was designed, and part of debugging work is finished. The system uses DSP (digital signal processor) , MCU (Microcontrol Unit) and CPLD (Complex Programable Logic Device) as the core of the system hardware, and finish hardware platform of code identifying system.The system uses vedio decode chip SAA7113 of Philips Company to finish transform from analog image to digital image and decompound synchronous signal The system can accomplish exchanging video signal input from camera into digital images and data processing. On communicating, using USB interface to complete data communication with PC.This paper pays more attention to hardware platform design of code idnetifying system. Integral notion of system design is brought out at the beginning of the text. Secondly, detail technical information of module design is narrated in each chapter. At last part of paper, some problems encountered in system debugging and method on resolving these problems are brought out, and some suggestions for system optimization are also provided. This paperprovides some valuable reference for design of image collecting and processing system based on DSP.更多还原