Detection of motion by real time image comparison or multiplex method for lower-priced solutions. Picture analysis in up to 5 measurement periods simultaneously (from a minimum 40 ms up to a maximum 10 sec.). Measurement periods can be en/disabled individually to permit differentiation of slow- and fast moving objects relating to alarm signals. Up to 64 monitoring areas per camera for optimal adjustment to complex surveillance scenes. Every monitored area is individually adjustable in size, function, position, and sensitivity. Suppression of unwanted alarm signals, caused by lighting changes, camera movement or weather-induced changes without compromise of target detection capability.