Method for measuring the height profile of a vehicle passing on a road

摘要

A method for measuring a height profile of a vehicle passing on a road, said method comprising the following steps: directing a monocular camera from a point above the road onto the road with an angle of aperture that captures a section of the road from above, recording at least a first image of the passing vehicle by the camera at a first moment in time, recording at least a second image of the passing vehicle by the camera at a second moment in time, generating a movement vector image of the vehicle from an analysis of the optical flow between the first and the second image, and creating the height profile of the vehicle from the movement vector image.

主权项

1. A method for measuring a height profile of a vehicle passing on a road, the height profile comprised of object points, comprising:
directing a monocular camera with an image recording sensor having a square or rectangular image recording plane from a point above the road in an invariant direction onto the road with an angle of aperture, wherein the camera two-dimensionally captures, over said angle of aperture, a section of the road from above; recording at least a first image of the passing vehicle by the camera at a first moment in time, the first image being two-dimensional in said image recording plane and comprising a first plurality of image points; recording at least a second image of the passing vehicle by the camera at a second moment in time, the second image being two-dimensional in said image recording plane and comprising a second plurality of image points; generating a movement vector image comprised of movement vectors from an optical flow analysis of an optical flow between the first image and the second image; and creating the height profile of the vehicle from the movement vector image by considering that image points of the vehicle's object points which pass closer to the camera have larger movement vectors in the movement vector image than image points of the vehicle's object points which pass more distant from the camera.