High-precision roadside vehicle measurement method, device and system based on composite optical model

The invention relates to a high-precision roadside vehicle measurement method, device and system based on a composite optical model, and the method comprises the steps: U1, arranging the composite optical model at a roadside, and carrying out the combined calibration of a camera and a laser range finder of the composite optical model, image point coordinates of a target vehicle passing through the main optical axis of the laser range finder on the camera image are obtained, so that image point coordinate data information of the target vehicle is output; u2, based on the image point coordinate data information of the target vehicle, calculating the position of the target vehicle by adopting a tracking control conversion algorithm to obtain multiple pieces of position coordinate data information of the target vehicle; and U3, based on the multiple pieces of position coordinate data information of the target vehicle. The position information of the vehicle can be tracked and accurately estimated, the pose of the