A method for monitoring an environment (U) of a vehicle (F), wherein the environment (U) and objects (O1, O2) present therein are detected by means of at least a first image detection unit (1) and a second image detection unit (2), of which the detection regions overlap at least partially and form an overlap region, wherein an overall image (G) is produced from individual images detected by means of the image detection units (1, 2) by means of an image processing unit, the overall image (G) showing the vehicle (F) and its environment (U) from a bird's eye view. There is a progression of at least one boundary line (L1 to L3) which extends from an origin to the image edge of the overall image in such a way that the boundary line (L1 to L3) extends away from the objects (O1, O2).