"Hiding behind your glasses" just took on a whole new meaning. At Tokyo's National Institute of Informatics, Isao Echizen, an associate professor in the Digital Content and Media Sciences Research Division, unveiled a privacy visor -- a set of glasses that prevents cameras with face-recognition software from recognizing you. Echizen designed the glasses with near-infrared LEDs placed around the eyes and the bridge of the nose, two areas that computers use to pick out faces. Near-infrared is invisible to people, but many cameras can pick it up. The lights add digital "noise" to the image and when the computer tries to match the image with ones in a database, it gets confused and is unable to complete a match.

With improvements in facial-recognition technology and the increasing popularity of smartphones, the threat to one's privacy unexpectedly posed by Internet photos posted by strangers is growing day by day. To protect against unwanted scrutiny, trading company Nissey Corp., based in Sabae, Fukui Prefecture, has developed special glasses that thwart electronic facial recognition. The Privacy Visor is a set of white titanium goggles with lenses that have a mesh-like surface providing many tiny spaces to see through. "Since the view might not be clear, driving or riding on bicycles must be avoided," a Nissey spokesman warned. The glasses were jointly developed with the National Institute of Informatics, a research institute dedicated to information technology.