Technology Expanding Human Senses
A business owner arrives at his office one morning to find a door open, windows broken, and property strewn about. After calling the police, he reviews the surveillance video: not much more than blurry images of indiscernible shapes here and there. A car’s headlights flicker across the scene. Then nothing.
A night security officer hears an alarm, then sees a truck erratically driving away from a prohibited area. He calls in a report and requests law enforcement. After the area is secure, they review the security camera feed: black and white blurs; vaguely human silhouettes; darkness. The only witness says, I heard something, but I couldn’t see anyone.
Scenes like these are all too common. Of all known crimes, 70% happen at night, hidden under cover of darkness. To effectively reduce that crime statistic, video surveillance systems must extend and enhance surveillance capabilities into the dark, alerting security personnel before an event occurs.
Today, Hikvision is equipping video surveillance hardware to shatter that statistic and take night time video surveillance deeper into the darkness, lifting the cover of night to capture the kind of information that will lead to the prosecution of criminals. Here’s one way we are doing it.
Learning from the Human Eye
In humans, two types of photoreceptive cells – rods and cones – sit on the rear inner surface of the eye, known as the retina. These two light-sensitive cell types independently perform different functions to capture the visible world around us. The rods respond to brightness while cones capture and identify colours. The brain fuses the information into a single image.
Nature did it first, but emerging technology is going further. Hikvision’s DarkFighterX Series technology was developed from insight into the way human eyes see. Infrared sensors in the camera capture reflected Infrared light that is invisible to the human eye but very “bright” to the sensors – similar to the rods in our eyes. While these IR sensors only transmit in black and white, visible-light sensors in the camera are simultaneously detecting and decoding colours – like the cones mentioned above. Both sensors sit behind a single lens, just as the rods and cones in our eyes.