military imachinations: AutoTargetRecogintion

http://oemagazine.com/fromTheMagazine/apr02/targets.html
This article explains the function of a auto target recognition unit by the superposition of two different infrared spectral images. 
http://www.cfar.umd.edu/status_report97-99/Chellappa.html

Explanation of Ladar
http://ftp.arl.mil/~mike/papers/95cadsymp/sensors.html
High-Resolution Interactive Multispectral Missile Sensor Simulation for ATR and DIS


the superposition of a midwave and a lowwave infrared image constitute the base for this kind of ATR