“SLICE-ITERATION”, A METHOD FOR AUTOMATIC EXTRATION OF VEHICLE LASER POINT CLOUD

Abstract. In this paper a method “slicing-iteration” is proposed to realize automatic extraction of vehicle-borne laser point cloud, the main steps are as follows: (1) Confirm ground reference surface; (2) Dividing points: taking points at certain height range above reference surface, divide them by certain cell size (such as 0.1 m) and record points number of every cell; (3) Forming polyline: based on the number, for every cell, axially cluster is made, then find a neighbor with most similar number and form the two-point-line, further forming a polyline; (4) Iteration: dividing points and forming polyline can be conduct at different height range and by x/y axis, so as many features aspossible can be extracted. The method can also be used in half-automatic boundary extraction. Experiments show that the method in thepaper is easy to use, highly adaptive, with good extraction result.