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Two-layer QR codes

Yuan, Tailing, Wang, Yili, Xu, Kun, Martin, Ralph R. and Hu, Shi-Min 2019. Two-layer QR codes. IEEE Transactions on Image Processing 28 (9) , 4413 - 4428. 10.1109/TIP.2019.2908490

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A quick-response code (QR code) is a two-dimensional code akin to a barcode that encodes a message of limited length. In this paper, we present a variant of QR code, a two-layer QR code. Its two-layer structure can display two alternative messages when scanned from two different directions. We propose a method to generate such two-layer QR codes encoding two given messages in a few seconds. We also demonstrate the robustness of our method on both synthetic and fabricated examples. All source code will be made publicly available (

Item Type: Article
Date Type: Publication
Status: Published
Schools: Computer Science & Informatics
Publisher: Institute of Electrical and Electronics Engineers
ISSN: 1057-7149
Date of First Compliant Deposit: 8 February 2023
Last Modified: 02 May 2023 22:14

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