1. A method for monitoring an environment (U) of a vehicle (F), comprising: detecting the environment (U) and objects (O 1 , O 2 ) present therein by means of at least a first image detection unit ( 1 ) and a second image detection unit ( 2 ), the detection regions of which at least partially overlap and form an overlap region, forming a respective tolerance region around each detected object (O 1 , O 2 ), producing an overall image (G) from individual images detected by means of the image detection units ( 1 , 2 ), said overall image (G) showing the vehicle (F) and its environment (U) from a bird's eye perspective, and adjusting, depending upon determined positions of the objects (O 1 , O 2 ) and tolerance region around the detected objects (O 1 , O 2 ) in the overall image (G) between a first individual image region (EB 1 ) and a second individual image region (EB 2 ), a progression of at least one boundary line (L 1 to L 3 ) extending from an origin to the image edge of the overall image (G) so that the boundary line (L 1 to L 3 ) avoids the objects (O 1 , O 2 ) and the tolerance regions around the detected objects (O 1 , O 2 ).