Reduction of reflector code size by polarization film for infrared laser radar

Since the birth of vehicles, vehicles have given good and comfortable experiences for people to go anywhere in any time. However, traffic accidents such as vehicle to vehicle collision and vehicle to pedestrian collision are increasing with the increase of vehicles. For tracking vehicles, recognition systems of the license plate using cameras and image processing technology have been developed. However, these systems become expensive and complicated for dedicated usage. To solve these problems, we have proposed a recognition method of the vehicle code using infrared laser radar. We set up a two-dimensional code created by reflectors on the vehicle, and acquire the vehicle information by reading the reflector code by infrared laser radar. However, since the size of reflector code is large, the rear image of the vehicle becomes unnatural. In order to reduce the size of reflector code for recognizing 2D reflector code by using infrared laser radar, we propose a code size reduction method by using polarization film. Through experiments, we show that the proposed method is able to reduce the size of reflector code effectively.