1. A method of tracking movements of objects to infer a topology of a network of multiple cameras, comprising: sequentially obtaining images from the multiple cameras; extracting at least one moving object from each of the obtained images; determining and registering appearing cameras and appearing times at which the moving objects appear, and disappearing cameras and disappearing times at which the moving objects disappear, for the multiple cameras; and inferring the topology of the network using the appearing cameras and appearing times and the disappearing cameras and disappearing times.