1. A surveillance module ( 4 ) for a video surveillance system ( 1 ), wherein the surveillance module ( 4 ) can be data-coupled and/or is data-coupled to at least one surveillance camera ( 2 ), wherein the at least one surveillance camera ( 2 ) is directed to a surveillance region, and the surveillance region can be displayed or is displayed as a surveillance scene that includes or can include moving foreground objects, and wherein the surveillance module ( 4 ) is designed to analyze the surveillance scene and to output a signal on the basis of the analysis, characterized in that the signal is output on the basis of the analysis of the scene background if deviations from predetermined base states occur.