题名: |
ALGORITHM FOR ESTIMATING MEAN TRAFFIC SPEED WITH UNCALIBRATED CAMERAS. |
作者: |
Dailey-DJ; Li-L |
关键词: |
Algorithms-; Estimating-; Traffic-speed; Video-cameras |
摘要: |
Presented is a new algorithm for estimating speed by using a sequence of video images from an uncalibrated camera. An assertion is made that exact calibration is not necessary for estimating speed. Instead, the following are used to propose a novel method that extracts scale information and estimates speed: (a) geometric relationships inherently available in the image; (b) some common sense assumptions that reduce the problem to a one-dimensional geometry; (c) frame differencing to isolate moving edges and to track vehicles between frames; and (d) the distribution of vehicle lengths. |
总页数: |
Transportation Research Record. 2000. (1719) pp27-32 (5 Fig., 20 Ref.) |
报告类型: |
科技报告 |