1. A method of determining motion vectors which are assigned to individual image regions of an image, wherein the image is subdivided into a number of rectangular image blocks, and a motion vector is assigned to each block of the number of rectangular image blocks, the method comprising: defining, using a first image processing unit, a corner region located in a corner of a selected one of the number of rectangular image blocks; determining, using a second image processing unit, a set of image blocks adjacent to the corner region; determining, using a third image processing unit, whether the motion vectors assigned to the set of image blocks adjacent to the corner region form a homogeneous vector field, and in response to a determination that the motion vectors assigned to the set of image blocks adjacent to the corner region form a homogeneous vector field, generating, using a fourth image processing unit, a motion vector for the corner region from the motion vectors of the set of image blocks adjacent to the corner.