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<p>Quick response (QR) codes are ubiquitous in logistics, URL embedding, and digital transactions due to their ability to store and convey data efficiently. Despite their widespread use, applying QR codes to materials unsuitable for stickers or impractical for laser engraving remains challenging. Stenciling offers a viable alternative, yet creating QR code stencils introduces difficulties in maintaining connectivity and structural integrity, as isolated regions (<i>islands</i>) can detach during fabrication. This paper presents <i>StencilQR</i>, a novel adaptation of QR codes specifically designed for stencil applications. <i>StencilQR</i> addresses the island issue by detecting and connecting these areas with strategically placed bridges, thereby enhancing structural integrity. Furthermore, <i>StencilQR</i> reinforces weak connections, such as cantilever-like parts, by employing a mass-spring simulation to efficiently identify and fortify fragile regions. Our evaluations demonstrate that <i>StencilQR</i> is robust across diverse applications and materials, ensuring high-fidelity data encoding and decoding while maintaining durability during stencil creation and use. Moreover, because <i>StencilQR</i> does not exploit structures unique to QR codes, it can be readily adapted to other 2D patterns requiring minimal yet effective connectivity modifications.</p>

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StencilQR: connectivity-enhanced fabricable QR codes for stencil

  • 期刊论文

  • 发表日期：

    2025年5月26日

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  • Naoki Kita

摘要

Quick response (QR) codes are ubiquitous in logistics, URL embedding, and digital transactions due to their ability to store and convey data efficiently. Despite their widespread use, applying QR codes to materials unsuitable for stickers or impractical for laser engraving remains challenging. Stenciling offers a viable alternative, yet creating QR code stencils introduces difficulties in maintaining connectivity and structural integrity, as isolated regions (islands) can detach during fabrication. This paper presents StencilQR, a novel adaptation of QR codes specifically designed for stencil applications. StencilQR addresses the island issue by detecting and connecting these areas with strategically placed bridges, thereby enhancing structural integrity. Furthermore, StencilQR reinforces weak connections, such as cantilever-like parts, by employing a mass-spring simulation to efficiently identify and fortify fragile regions. Our evaluations demonstrate that StencilQR is robust across diverse applications and materials, ensuring high-fidelity data encoding and decoding while maintaining durability during stencil creation and use. Moreover, because StencilQR does not exploit structures unique to QR codes, it can be readily adapted to other 2D patterns requiring minimal yet effective connectivity modifications.