A robust and high-capacity 2D image code applied to camera-enabled mobile phones

• Main Authors: Hsiang-An Shieh, 謝翔安
• Other Authors: Jen-Chang Liu
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/49486290741928085245

碩士 === 國立暨南國際大學 === 資訊工程學系 === 96 === In this paper, we propose a novel 2D image code which carries not only the hidden information, but also visual information. Steganography approach is applied to hide information in a natural image to generate the 2D image code. The 2D image code is printed or displayed. Users shoot it by camera-enabled mobile computing device then extract the hidden information. In order to resist the print-and-photo attack, suitable position detection pattern is put on the surroundings of the 2D image code. To improve the visual quality of the 2D image code, a perceptual shaping algorithm is proposed that takes advantage of the Watson’s DCT-based perceptual model. Finally, we implement a web service to generate the 2D image code for the public and a Java-based 2D image code decoder on mobile phones. Possible applications of the 2D image code include business card, advertisement, and man-machine interaction with large display.