关键词: 光流, 逆行, 速报, 精报

Abstract: A retrograde-motion detecting method based on optical flow is proposed for retrograde-motion detection in a complex environment. Firstly, the optical flow of the movement area in each frame is calculated, and used to determine whether there may be retrograde-motion, this is called quick reporting. Then the report area is expanded, and the optical flow in the new area is calculated and tracked continuous to confirm whether it is real retrograde-motion, this is called exact reporting. To verify the effectiveness of the method, a comparison experiment with the traditional optical flow method is conducted. The results show that the better performance in terms of detection time and accuracy can be achieved using this method.

Key words: optical flow, retrograde-motion, quick report, accurate report