The method (200) involves reading a brightness value at a position of an image captured by a vehicle camera and another brightness value at another position of the image captured by another vehicle camera (210). The image positions and an identical position are represented in an environment of the vehicle, where the identical position is associated with an object. An object class of the object is determined based on a comparison of the brightness values (220), where the object is classified into a reflecting object or a luminescent object. Independent claims are also included for the following: (1) a method for controlling a light emission of a headlight of a vehicle (2) a device for determining an object class of an object (3) a computer program product having a program code to perform a method for determining an object class of an object.