When a vehicle equipped with an artificial vision system enters or exits a tunnel, the camera may temporarly suffer from reduced
visibility, or even get completely blind due to quick changes in enviromental illumination.
This paper presents a vision-based system that detects approaching tunnels entrances or exits. The proposed system allows
other ADAS (Advanced Driver Assistance Systems) to act on camera parameters to effectively avoid the tunnel blindness effect. Information regarding approaching tunnel entrance
can be helpful for other sensors as well and for sensor fusion systems. In terms of path planning, this system can also inform
GNSS-based systems (Global Navigation Satellite System), which usually do not receive any signal in tunnels, and trigger dead reckoning techniques.
The proposed system is noticeably fast and therefore well fit to be used as a background process to support other ADAS applications.
Keywords Intelligent vehicle – autonomous driving – ADAS – tunnel detection