1. A method for determining a number ( 13 ) of transfer objects ( 1 ; 2 ; 3 ; 4 ) which move from a first sub-region ( 8 ) of an observed region ( 5 ) into a second sub-region ( 9 ) of the observed region ( 5 ), wherein a sequence of images of the observed region ( 5 ) is recorded, in which objects ( 1 ; 2 ; 3 ; 4 ) are identified and positions ( 1 b , 1 c ; 2 a , 2 b , 2 c ; 3 a , 3 b , 3 c ; 4 a , 4 b ) of the objects ( 1 ; 2 ; 3 ; 4 ) are determined, the objects ( 1 ; 2 ; 3 ; 4 ) are each associated, in accordance with their positions ( 1 b , 1 c ; 2 a , 2 b , 2 c ; 3 a , 3 b , 3 c ; 4 a , 4 b ), either to the first sub-region ( 8 ) or the second sub-region ( 9 ), and multiple transfers of the same object ( 1 ; 2 ; 3 ; 4 ) between the first sub-region ( 8 ) and the second sub-region ( 9 ) are taken into account when determining the number ( 13 ) of transfer objects.