A Study on Two Dimensional Code and its Application

• Main Authors: Yeh, Chung-Tsai, 葉俊才
• Other Authors: Chen Ling-Hwei
• Format: Others
• Language: zh-TW
• Published: 1997
• Online Access: http://ndltd.ncl.edu.tw/handle/03368842132406211114

碩士 === 國立交通大學 === 資訊科學學系 === 86 === In the thesis, we will develop a 2D code system and put emphasis on three topics: security, error correction and reading problems. The system can encodeEnglish, Chinese and special characters. About security, a new idea isproposed. The input data is divided into two parts: general data and secretdata. In order to achieve the security purpose, we hide the secret data in the2D code pattern which contains the general data and some extra codes for errorcorrection. In the part of error correction, the Reed-Solomon(RS) code withhigh error correction capability is chosen to recover errors. As to the designof the 2D code pattern, some reading problems are considered, these problemsinclude broken, noise, rotation, projection distortion, scaling and unstablelighting conditions. Experimental results are given to show that the proposedsystem is robust for these reading problems. Besides, we also design aname-card management system.