1. A method for ascertaining a height profile of a road situated ahead of a vehicle, comprising: reading in a movement profile of an object which is provided by a first image sensor, the movement profile being read in as a plurality of images; and reading in at least one parameter with regard to the object from a parameter sensor which is independent of the first image sensor; and determining the height profile of the road situated ahead of the vehicle based on at least one vertical position of the object in the image and the at least one parameter.