Filtering Method of Airborne Laser Scanner Data by Entropy

Abstract

We propose a new method to select data points on the surface through three dimensional point data obtained from the laser scanner loaded on the airplane.We prove through experiments that this method extends the conventional one (Masaharu et al., 2002) from the viewpoint of entropy, which makes it possible to select the landform including slopes and asperities such as tilted ridges and valleys, and select the slope from the building and slope of the similar difference of the height. Finally we comment on the respects in which the proposed method is improved and on future prospects.