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Tag: hidden code

Hidden QR codes

May 24, 2012May 24, 2012

Look at this amazing QR application by the Korean retailer Emart. They deployed 3D “Shadow QR codes” that only work during certain sunlight hours, lunchtime specifically. In Seoul, the retailer uses hidden 3D QR codes and the sun to deliver discounts only during its quiet times.

Posted in art, displayTagged advertising, hidden code, QR codesLeave a comment
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