Computers can’t replace humans when it comes to tattoo recognition. That’s a key finding from the Tattoo Recognition Technology Challenge Workshop hosted by the National Institute of Standards and Technology. But computer algorithms are getting better, and new standards are being considered for the collection of tattoos. While tattoos are a secondary biometric - as opposed to a primary biometric like iris or fingerprint - sometimes they’re the best option available for law enforcers trying to make a positive identification. NIST computer scientist Mei Ngan organized the technology challenge and led the workshop. She spoke with Regarding ID’s Gina Jordan.