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pngqr & qrscanner: encode and decode QR codes without Java

by Andys —

QR codes are those 2D barcodes that can store over 1000 characters and even include error correction.

pngqr gem lets you generate QR codes in PNG files, and has only pure ruby dependencies.

qrscanner gem will detect and decode a QR code using any ImageMagick-supported image format (including PDF). Uses the ZXing C++ library (which currently only compiles on Linux) instead of Java to reduce memory bloat.

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