A suspect is fleeing a crime scene through a crowded marketplace. Closed circuit cameras discreetly scanning the crowds register his speed of movement and trigger alarms. Meanwhile, even as other cameras keep tracking the suspect, a computer system, which the cameras are linked to, pick up a match in terms of the suspect's face and gait from a database for crime suspects. It sends out a real time alert to the law enforcement agencies.
What is described above is a futuristic scenario, but with the application of video and closed circuit camera technology on the threshold of a quantum leap of pervasiveness, researchers are chipping away at machine vision technologies that could become the norm for security in modern cities.
The app also syncs with social networks so audio clips can be easily uploaded onto Facebook, or emailed to pals. It can run constantly whenever the smartphone is turned on, but it does have a red banner at the top of the phone screen to remind the user it is still on. Heard is available free with 12 seconds' recording time, or for USD 1.99 for up to 5 minutes in the Apple store.
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