3 D laser sensing at FOI - overview and a system perspective

摘要

This paper will give an overview of 3 D laser sensing and related activities at the Swedish Defence Research Agency (FOI) in the view of system needs and applications. Our activities include data collection of laser signatures for target and backgrounds at various wavelengths. We will give examples of such measurements. The results are used in building synthetic environments, modelling of laser radar systems and as training sets for development of algorithms for target recognition and weapon applications. Present work on rapid environment assessment includes the use of data from airborne laser for terrain mapping and depth sounding. Methods for automatic target detection and object classification (buildings, trees, man-made objects etc.) have been developed together with techniques for visualisation. This will be described in more detail in a separate paper. The ability to find and correctly identify "difficult" targets, being either at very long ranges, hidden in the vegetation, behind windows or under camouflage, is one of the top priorities for any military force. Example of such work will be given using range gated imagery and 3 D scanning laser radars. Different kinds of signal processing approaches have been studied and will be presented more in two separate papers. We have also developed modeling tools for both 2 D and 3 D laser imaging. Finally we will discuss the use of 3 D laser radars in some system applications in the light of new component technology, processing needs and sensor fusion.