Abstract: A method and a system for monitoring a spatial area in a personnel interlock are provided. Image data are acquired which represent a plurality of depth images of the spatial area which have been acquired simultaneously and from different positions in the area of the personnel interlock, in each case by a respective 3D image sensor arranged at the corresponding position. For each of the depth images, an associated characteristic depth image value is calculated. A total image value is obtained by combining the characteristic depth image values of the various depth images in accordance with a predetermined monotonic combination rule. An estimation result for the probability that more than one person is present in the spatial area is then determined.

Abstract: A method and device are provided access control of persons. The method includes: detecting by sensor a reference radiation in the infrared, IR, wavelength range using an IR image sensor; and calibrating the IR image sensor as a temperature sensor in relation to the acquired reference radiation used as a standard at the reference temperature. The method also includes acquiring by image sensor at least an area section of a body surface of a person to be controlled and generating thermal image data representing the thermal image of the area section acquired; determining a body temperature of the person; and allowing or denying access of the person to an access-restricted spatial area based on the determined body temperature.

Abstract: A method and a system for monitoring a spatial area in a personnel interlock are provided. Image data are acquired which represent a plurality of depth images of the spatial area which have been acquired simultaneously and from different positions in the area of the personnel interlock, in each case by a respective 3D image sensor arranged at the corresponding position. For each of the depth images, an associated characteristic depth image value is calculated. A total image value is obtained by combining the characteristic depth image values of the various depth images in accordance with a predetermined monotonic combination rule. An estimation result for the probability that more than one person is present in the spatial area is then determined.