A method for controlling access rights by means of an access control system, wherein access rights or IDs, to which at least one access right is uniquely assigned, which are stored on data carriers or mobile electronic devices are detected and read out contactlessly by means of reading devices which are connected to a server, wherein at least three reading devices are provided in each entrance area of the access control system, which reading devices cover the entire entrance area, wherein a plurality of cameras that are connected to the server are provided in each entrance area of the access control system, which cameras cover the entire entrance area, wherein, in the context of a first method, the current position of the data carriers or mobile electronic devices is detected by means of the detection of the data carriers or the mobile electronic devices, on which a valid access right or an ID, to which a valid access right is uniquely assigned, is stored, by means of at least three reading devices by trilateration or multilateration, and wherein, by means of a second imaging method which is carried out in parallel with the first method, the current position of all of the people present in the entrance area of the access control system is detected by means of the cameras, as a result of which the people who are carrying with them at least one access right in the form of a data carrier or a mobile electronic device, on which a valid access right or an ID, to which an access right is uniquely assigned, is stored, and all of the people present in the entrance area are detected spatially in real time, so that an ID map and a people map is created on the server, wherein the ID map corresponds to the spatial distribution of the people who are carrying with them at least one valid access right in the form of a data carrier or a mobile electronic device, on which a valid access right or an ID, to which an access right is uniquely assigned, is stored, and the people map corresponds to the spatial distribution of all of the people in the entrance area of the access control system, wherein the data delivered by the two methods are compared with one another on the server, in order to create an overlay map in the context of a "matching" of the ID map with the people map, in which overlay map the people who are carrying with them at least one valid access right in the form of a data carrier or a mobile electronic device, on which a valid access right or an ID, to which an access right is uniquely assigned, is stored, and the people without a valid access right are identified, wherein it is determined whether the determined position of a person detected by means of the second imaging method corresponds to a position, determined by means of the first method, of a data carrier or a mobile electronic device, on which a valid access right or an ID, to which at least one valid access right is uniquely assigned, is stored, wherein, if this is not the case, a person is detected and localized, who has no valid access right, wherein the movement profiles are evaluated according to the overlay map in real time, wherein, if people, who are carrying with them a valid access right according to the overlay map, pass a predetermined virtual line, which corresponds to access to the zone monitored by the access control system, a corresponding entry is created on a server of the access control system, and wherein if people, who are identified as people without a valid access right according to the overlay map, pass the predetermined virtual line, an unauthorized access is detected, as a result of which an access control system without barriers is realized.