http://www.dailymail.co.uk/sciencetech/article-2119386/Could-governments-recognise-ANYONE-instantly-CCTV-Japanese-camera-scan-36-million-faces-second.html
Big Brother just got scarier: Japanese CCTV camera can scan 36 million faces per second - and recognise anyone who has walked into its gaze
-Biometric camera stores details of everyone who walks past it
-Stores 'library' of face info
-Can scan through 36 million faces per second searching for people
-Will be on sale to governments within next year
The software from Hitachi Hokusai electric can scan through 36 million faces a second looking for its 'target'. The software can scan through days of CCTV footage almost instantly
I'm not sure what similar technology of this magnitude is already out there but this sounds insane.