Yasuharu Jin Yuichiro Goto Hiroyuki Naito Y. Aono Akio Iwake In-Motion Inspection of Obstacles around Railways by a Highly Accurate Laser-Sectioning Method. 629-632 1992 MVA http://b2.cvl.iis.u-tokyo.ac.jp/mva/proceedings/CommemorativeDVD/1992/papers/1992629.pdf conf/mva/1992 db/conf/mva/mva1992.html#JinGNAI92