3-D Imaging by Laser Radar and Applications in Preventing and Combating Crime and Terrorism

摘要

This paper describes the ongoing research on 3-dimensional (3-D) imaging at FOI. Specifically, we address the new possibilities brought by laser radars, focusing on systems for high resolution 3-D imaging. 3-D laser radar is a viable technology in the effort to prevent and combat crime and terrorism. Real time 3-D sensing is a reality and can, besides more conventional techniques such as stereo vision and structured light, be achieved by range imaging. Current development of 3-D sensing flash imaging laser radars will provide the capability of high resolution 3-D imaging at long ranges with cm- resolution at full video rate. In all probability, this will revolutionize many applications, including law enforcement and forensic investigations. In contrast to conventional passive imaging systems, such as CCD and infrared (IR) techniques, laser radar provides both intensity and range information and has the ability to penetrate certain scene elements such as vegetation and windows. This, in turn, means new potentials, for example, in object recognition and identification and we address some of these new capabilities of 3-D laser radar systems. The results clearly show that 3-D imaging laser radar systems are useful in a variety of situations that can be used in the criminal justice system today to enable technologies for preventing and combating crime and terrorism.