New sensor concept for intra-frame scene and speed capturing

Deployment of automated traffic surveillance systems play an important role in traffic law enforcement. Existing devices use RADAR or LIDAR technologies for speed measurement, as well as cameras for license plate recognition. It would be profitable to replace those relatively expensive active systems with a single camera for both tasks. An optical based vehicle speed measurement method is presented in this paper. The proposed method calculates speed estimates based on a single, superimposed frame, which contains information of the movement of certain objects during exposure, and can be obtained through modified shutter control. An applicable sensor structure and exposure-control are also shown, as well as some experimental results.