Tests Show Decorative Round, Triangle and Hexagon QR Codes Scan Reliably

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A developer behind the qr-code-shapes JavaScript library rendered 208 decorative QR code variants in circle, triangle and hexagon shapes. Each was tested at seven sizes with two open-source decoders, ZXing-C++ and jsQR. The author explains that QR codes are always square grids under the ISO/IEC 18004 standard, so the shaped versions are square codes with decorative artwork around them. With ZXing-C++, every combination decoded at 250 pixels and above, both sharp and blurred. The results suggest the decoder ignores the surrounding shape and the outer decoration does not interfere with reading.

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