Design of real-time speed limit sign recognition and over-speed warning system on mobile device

The paper designs and implements a real-time speed limit sign recognition and over-speed warning system on android mobile devices. The proposed system can inform car drivers the current speed limit by recognizing speed limit signs. Furthermore, we also combine GPS function with speed limit sign recognition to warn car drivers in over-speed condition which can avoid car drivers to get punished tickets and put their lives at risk. The experimental results show the accuracy of recognition of speed limit signs is over 87%, and our system can assist car drivers for safe driving with their android mobile devices easily.