RealNews

Printers invent cheap security

XEROX researchers have discovered a method that uses an ordinary printer to insert hologram-like images in common documents. The company also revealed it was serendipity and proximity that led to the discovery. Xerox researchers were examining ways to eliminate the problem of uneven glossy patches, called differential gloss, typically considered a defect on a print. Chu-heng Liu, who works at Xerox’s Wilson Center for Research and Technology, said it occurred to the researchers that the problem could be turned on its head. By deliberating creating this effect, using a combination of software, halftones and tones, the researchers found they could embed an image that could only be seen by tilting the printed paper and viewing it at an angle, much like a hologram. Full Story

OODA Analyst

OODA Analyst

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