LDW lane departure warning system is a system of a vehicle to reduce the traffic accidents due to the lane departure assist the driver by way of an alarm.
1. The lane departure warning system Glossary
lane departure warning system is a system of a vehicle to reduce the traffic accidents due to the lane departure assist the driver by way of an alarm.
The smart system provides a lane departure warning, when the unconscious (driver does not turn signal) offset from the original lane can alert 0.5 seconds prior to departing from the lane, as provide the driver more reaction time, greatly reducing the impact caused by accidents due to lane departure, addition, LDWS correct driver can not fight the habit of turning lights, the system is its main function is to remind fatigue or resolve long monotonous and driving inattention and so on.
.
2 vision classification system
lane departure warning system has been commercialized products are based on the use of the visual system, according to the camera mounting positions are different, the system can be divided into:
● side system – a camera mounted on the vehicle side, obliquely directed lane;
● front view of the system – a camera mounted on the front portion of the vehicle, lane obliquely forwardly directed.
system or whether it is a side view of the system before, by sensing the state of the road and the vehicle, the lane departure evaluated three basic algorithms and signal display module interface components. First, the system through the state sensing module sensing road geometry features and dynamic parameters of the vehicle, and the lane departing from the evaluation algorithm of evaluation of the possibility of lane departure is performed, when necessary, an alarm signal to the driver through the display interface.
3. Domestic lane departure warning system
Domestic lane departure warning system
● JLUVA-1 System
the system was developed by intelligent vehicle Jilin University research group. The system is based on the front view monocular vision system, mainly by vehicle power, embedded computer, a display device consisting of black and white CCD camera, the data lines, speakers and an image acquisition card.
system uses a road image in front of the CCD camera installed at a position to acquire car rearview mirror, obtaining the current vehicle position in the lane parameter by image processing, when the car upon detection of the white line from the own lane too close there may be biased into the adjacent lane and when the driver did not hit the turn signal, the system will issue a warning message to remind drivers to pay attention to correct this unintentional lane departure, reducing as much as possible lane departure accidents.
● art DSP-based embedded lane departure warning system
Southeast University developed system, based on monocular vision is a front view of the system, by the analog / digital conversion module and a decoding circuit, a buffer circuit module , media processor DSP circuit modules, encoding and digital / analog conversion circuit module modules. The system acquires through car camera analog video signal is tracked lane mark, the decoded number to generate a high-speed digital signal processor DSP of the media stream after a video interface buffer, and then the digital video signal feature values of the lane by the video processing module extraction, and finally the processed video signal encoding and transmitting digital / analog conversion circuit output display.