A car that will keep you awake!
Berlin: Falling asleep behind the wheel of your car will be a thing of the past when built-in sensors sound an alarm the moment they detect your eyelids have closed, according to a team of German scientists.
Researchers at the Fraunhofer Institute for Digital Media Technology in Ilmenau, Germany, have developed an eye-tracking device that could soon help keep drowsy drivers alert on the road for a fraction of the cost of existing systems.
The Eyetracker, which is being unveiled at a vision-industry trade fair in Stuttgart, monitors drivers` lines of vision and issues a warning if they appear to be nodding off. After three months of in-car tests, the device will be ready for sale to auto makers, which according to Fraunhofer developer Peter Husar, could be early next year.
The Eyetracker costs about one-tenth the price of similar devices, Husar says. These other devices also require complicated calibration to be customized to an individual`s eyes. The special feature of the Eyetracker is that it can be installed in any model of car. There is no need for a complicated calibration of the cameras.
"With conventional systems, every person whose line of vision is to be monitored has to complete more or less time-consuming preparations. Because every head, every face, every pair of eyes is different," notes Husar.
There is also another benefit: The system does not require a PC or a laptop.
"What we have developed is a small modular system with its own hardware and programmes on board, so that the line of vision is computed directly within the camera itself. Since the Eyetracker is fitted with at least two cameras that record images stereoscopically - meaning in three dimensions - the system can easily identify the spatial position of the pupil and the line of vision," according to Husar.
The information is fed out through a standard interface. The information is stored in a standard interface (USB, CAN). This way, the Eyetracker can be connected directly to the car`s trip computer.
If the camera modules detect that the eye is closed for longer than a user-defined interval, it sounds an alarm. When used as a driver-assistance system, there can be four or even six cameras keeping watch over the driver`s eyes. The cameras evaluate up to 200 images per second to identify the line of vision, even when a driver`s head moves to the left or right.
Yet the Eyetracker is only roughly half the size of a matchbox and practically undetected when mounted behind the sun visor and in the dashboard. The tiny lenses are just three to four millimetres in diameter.
There are a host of other applications for the Eyetracker. In medicine, the camera system can assist with eye operations by registering a patient`s every eye movement.
With this technology, players of computer games can also look around themselves, without requiring a joystick to change their viewing direction.
It is also a valuable tool for marketing and advertising researchers with an interest in determining which parts of a poster or advertising spot receive longer attention from their viewers.
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