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Research on Recognition Algorithm of QR Code and the Implementation in Embedded System

Author: ZhangMin
Tutor: ZhengJianLi
School: Donghua University
Course: Pattern Recognition and Intelligent Systems
Keywords: QR Code Symbol Characteristic Barcode recognition Embedded Systems μC/OS- Ⅱ
CLC: TP368.1
Type: Master's thesis
Year: 2011
Downloads: 78
Quote: 0
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Abstract


Barcode technology is a collection of computer technology, communication coding technology , automatic identification technology , an emerging recognition technology . The preparation of the information in accordance with the specific coding principles in different barcode reader barcode reader information . After decades of development , barcode technology has a huge role to play in all areas of society . The one-dimensional bar code and two-dimensional bar code barcode . One-dimensional bar code its easy to identify characteristics of a wide range of applications . Barcode overcome the small amount of information of one-dimensional barcode , and defects such as large dependence information includes information of a large capacity so that the two - dimensional barcodes can become independent data files , data transfer and integration of a high concentration of , and improve the efficiency of information transfer . In many two-dimensional bar code , QR its unique nature in the encoding of Chinese characters in Chinese characters to use area must have more application prospects . Due to the special structure of the symbol , the QR Code mainly in the fast and effective recognition algorithm . The subject of this article QR Code as the object of study, combined with embedded technology and digital image processing , and propose an ARM920T core - based the S3C2440A processor and CMOS image sensor combined bar code recognition platform . This article uses the open-source embedded operating system μC/OS- Ⅱ to achieve a stable and effective operation of the system functional tasks , the QR code automatic identification and decoding functions . The operating system of the transplant to ensure reliable and stable operation of the whole system , is conducive to the expansion of other functions in the future . The focus of the research of this article is on the basis of the analysis and research barcode recognition algorithms , starting from bar code symbols feature , barcode recognition , positioning and the bar code symbol information extraction optimization algorithm barcode enabling the full range of fast and efficient identification. The experimental results show that the rapid identification of the barcode recognition algorithm proposed in this paper can be achieved in the general image acquisition case , but with a certain stability .

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Micro-computer > A variety of micro-computer > Microprocessor
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