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http://dx.doi.org/10.6109/jkiice.2020.24.9.1123

An Embedded Information Extraction of Color QR Code for Offline Applications  

Kim, Jin-soo (Department of Info. & Comm. Engineering, Hanbat National University)
Abstract
The quick-response (QR) code is a two-dimensional barcode which is widely being used. Due to several interesting features such as small code size, high error correction capabilities, easy code generation and reading process, the QR codes are used in many applications. Nowadays, a printed color QR code for offline applications is being studied to improve the information storage capacity. By multiplexing color information into the conventional black-white QR code, the storage capacity is increased, however, it is hard to extract the embedded information due to the color crosstalk and geometrical distortion. In this paper, to overcome these problems, a new type of QR code is designed based on the CMYK color model and the local spatial searching as well as the global spatial matching is introduced in the reading process. These results in the recognition rate increase. Through practical experiments, it is shown that the proposed algorithm can perform the bit recognition rate improvement of about 3% to 5%.
Keywords
Embedded Information Extraction; Offline Application; Color QR Code; Global Spatial Matching; Local Spatial Searching;
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Times Cited By KSCI : 4  (Citation Analysis)
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