1. A method for the identification of objects in a predetermined target area, comprising: recording a first and a second height profile of the predetermined target area, wherein the first and second height profiles are recorded at a predeterminable time interval; determining a height difference profile from the first and the second height profile; subdividing the height difference profile in equidistant horizontal height sections; calculating positions of centroids of surface areas enclosed by respective contour lines of the equidistant horizontal height sections; and supplying the determined height difference profile and the calculated centroids of the surface areas to a system for classifying objects.