Road surface obstacle detection method and device for counting vehicle behaviors based on road side unit

The invention discloses a road surface obstacle detection method and device for counting vehicle behaviors based on a roadside unit, and relates to the technical field of information, and the method comprises the steps: obtaining a road surface image of a current frame; performing inter-frame difference on the pavement image of the current frame and a pavement image of a previous frame corresponding to the current frame to obtain a static grid region in the pavement image of the current frame; performing gray scale matching on the static grid area and a road surface reference image when no vehicle runs, and determining a to-be-detected obstacle according to a matching result; according to the target grid occupied by the to-be-detected obstacle in the current frame of road surface image and the perspective view corresponding to the road surface reference image, evaluating the interference degree of the to-be-detected obstacle to the actual passing of the vehicle; and carrying out vehicle early warning based on