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Study on the QRcode Technology and the Application of Its Agricultural Products Traceable Logistics

Author: GaoYuJia
Tutor: ZhangXuDong
School: Hefei University of Technology
Course: Computer Applications
Keywords: Two-dimensional bar code QRcode Image processing Agricultural Product Logistics
CLC: TP391.44
Type: Master's thesis
Year: 2009
Downloads: 314
Quote: 6
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Abstract


Bar code technology in the early 1970s, as one by far the most economical and practical automatic identification technology has been widely applied in many fields. Practical applications in a limited area in order to meet the information needs of more types and greater capacity to make up for the one-dimensional bar codes in the restricted information capacity deficiencies, born out of a two-dimensional bar code technology. Study abroad on a two-dimensional bar code technology far earlier in China, which hold a variety of symbologies such as PDF417, QRoode, Code 49 core technology, domestic instrument one or two companies have our own intellectual property second dimensional bar code. Focus and difficulty of the two-dimensional bar code technology is the bar code identification, have a large capacity, high density, and error correction capability, safety and high intensity recognition technology is more complex than the one-dimensional bar code identification. Therefore, the study for the two-dimensional bar code encoding and recognition technology for reducing the cost of the application of the two-dimensional bar code technology to promote the two-dimensional bar code widely used in China's extremely far-reaching significance. Quick response code (QRcode) matrix as a two-dimensional bar code, because of the large amount of information, fast reading speed can be all-round reading specific data compression mode, said Chinese characters has the advantage, in our country have a good prospects for development. Select the QRcode as the object of study of this thesis, through the analysis of the sign structure, its encoding rules and error correction coding algorithm research, design and realization of the QR Code symbol coding software, image preprocessing and for QRcode symbol of the characteristics given and recognition algorithms. At present, the quality and safety of agricultural products (food) face of emerging traceability system as an effective way to control the quality and safety of agricultural products by the world increasingly widespread concern. This paper presents the the QRcode code technology in agricultural products traceability logistics system can effectively track the entire process of the supply chain of agricultural products lay the foundation for effective traceability of agricultural products. The thesis completed research content and research results are as follows:. The QRoode code encoding algorithm, including encoding rules, error correction coding algorithm; 2. Around QRcode two-dimensional bar code image preprocessing algorithm the recognition decoding algorithm study . Distortion correction algorithm improvements have been made to achieve an accurate reading QR Code symbol. 3 C # development tools to design and realize the the QRcode code encoding and decoding system. 4 Design QR Code technology-based agricultural products traceability logistics system applications. The experimental results show that in the Visual Studio. NET platform, the system is able to correct coding and recognition, proved the viability and stability of the above algorithm. Finally, the paper made research and experiments conducted and summarized, and the direction and goal of the future research work.

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Pattern Recognition and devices > Optical pattern recognition devices
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