Abstract :
Throughout the world, security issues are becoming increasingly important due to the current political and economical situation. Formerly reserved to the Defence sector, surveillance technologies for site monitoring are now required in many sectors. To this aim, very often a multitude of sensors using different technologies are installed, i.e. radar, intensification light cameras, CCTV, infrared barriers, lasers, IR cameras. These are spread around or within the monitored area in order to secure it.