Abstract
This paper describes a system that confirms vehicle drivers' safety based on the images taken by the camera located in front of the vehicle before going into the intersection. While vehicle approaches an intersection slowly, this system detects another vehicles approaching to the same intersection. We accomplish the detection by removing background regions using frame-difference. In order to extract vehicle regions correctly, it is necessary to adjust the interval of frame-difference according to the location of the vehicle extracted from the previous frame. Furthermore, in order to extract both farther vehicle and closer vehicle correctly, two kinds of interval, shorter and longer, are adopted. Also, when the vehicle is running, the background regions of taken images change non-lineally. Therefore, it is necessary to transform images taken from different viewpoints to images observed from one same viewpoint by perspective transformation. Based on the transformed images of each frame, the vehicle regions can be extracted using frame-difference. Moreover the running directions of extracted vehicles can be determined by tracking the vehicles' location for several frames. Experimental results show that the proposed method is efficient.
