1. A method of monitoring monitored locations by means of a monitoring system comprising a plurality of separate monitoring modules, each of which has a light-sensitive sensor, for monitoring the monitored locations, and a monitoring station comprising the steps of: recording within each of the plurality of monitoring modules an image of the monitored location associated with the plurality of monitoring module, extracting within each of the plurality of monitoring modules an area in the recorded image that differs from a reference image, extracting within each of the plurality of monitoring modules an object from the area, classifying within each of the plurality of monitoring modules the object based on characteristics, such as a characteristic of the type: size, shape and/or movement history, associated with the object, if the object is a human alarm object, transmitting, only if the object is classified as a human alarm object, data representing only the extracted area of the image in a stylized way, the stylized way representing a recognizable human shape, to the monitoring station, and recreating said transmitted data in the monitoring station and displaying the same to the operator for verification of the human alarm object.