QR_STENCILER & QR_HOBO_CODES
QR_STENCILER is a free, fully-automated utility which converts QR codes into vector-based stencil patterns suitable for laser-cutting.

The software is accompanied by the QR_HOBO_CODES, a series of one hundred QR stencil designs which, covertly marked in urban spaces, may be used to warn people about danger or clue them into good situations.

The QR_STENCILER and the QR_HOBO_CODES are part of a suite of homebrew "infoviz graffiti" tools for locative and situated information display.

The official web page for this project is:
fffff.at/qr-stenciler-and-qr-hobo-codes/.
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