1. A configuration module ( 7 ) for a surveillance system ( 1 ), the surveillance system ( 1 ) being designed to classify objects ( 9 ) that have object characteristics in a surveillance scene ( 12 ) on the basis of object characteristic ranges as objects to be monitored, and the configuration module ( 7 ) being designed to define the object characteristic ranges, characterized by a selection device ( 10 , 13 ) for the interactive selection and/or confirmation of the selection of an object ( 9 ) as the reference object ( 14 ), the object characteristic ranges being defined on the basis of and/or using the object characteristics of the reference object ( 14 ).