NEC is testing digital billboard technology that can recognize age and gender of passersby in order to serve up targeted ads, reports ABC News.  The company has rolled out the billboards as part of field tests at shopping malls in Japan, and it expects to begin similar tests in the US in two to three months.  ABC says the technology uses a still camera with facial recognition software and can identify a subject’s age to within ten years.  NEC told the news outlet that it expects to run into privacy concerns in the U.S.  Talking to the issue, NEC’s Takeshi Yamamoto said that the technology is designed to be anonymous in that it doesn’t collect information relevant to a person’s individual ID.  Read more at ABC News.