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二維條碼之研究

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(1) A Study on Two Dimensional Bar Code  NSC 87-2213-E-009-060  86/08/01~87/07/31.

(2)     E-mail: lhchen@cc.nctu.edu.tw Fax: (03) 5721490  (:  

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(12) „ / †>J‡ˆB‰Š‹a/Œ0 K9‰Š‹a@A[.  (Keyword: 2D code, error correction,. data hiding, automatic data collection.) In the report, we have developed a 2D code system and put emphasis on three topics: security, error correction and reading problems. The system can encode English, Chinese and special characters. About security, a new idea is proposed. The input data is divided into two parts: general data and secret data. In order to achieve the security purpose, we hide the secret data in the 2D code pattern which contains the general data and some extra codes for error correction. In the part of error correction, the Reed-Solomon(RS) code with high error correction capability is chosen to recover errors. As to the design of the 2D code pattern, some reading problems are considered, these problems include broken, noise, rotation, projection distortion, scaling and unstable lighting conditions. Experimental results are given to show that the proposed system is robust for these reading problems. Besides, we also design a name-card management system.. !"#$%&.

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