One of the main applications of the terrestrial laser scanner is the visualization, modeling and monitoring of man-made structures like buildings. Especially surveying applications require on one hand a quickly obtainable, high resolution point cloud but also need observations with a known and well described quality. To obtain a 3D point cloud, the scene is scanned from different positions arou...

Terrestrial laser scanners capture 3D geometry as a point cloud. This paper reports on a new algorithm aiming at the skeletonisation of a laser scanner point cloud, representing a botanical tree without leafs. The resulting skeleton can subsequently be applied to obtain tree parameters like length and diameter of branches for botanic applications. Scanner-produced point cloud data are not only ...

Correction of terrestrial Light Detection and Ranging (LiDAR) intensity data has been increasingly studied in recent years. The purpose is to obtain additional insight into the scanned environment that is not available from the geometric information alone. Radiometric correction, as the name implies, corrects the received intensity to standard reflectance values in the range of (0, 1). This cor...

Terrestrial laser scanners based on the time-of-flight measurement principle or the phase comparison method are used for cultural heritage documentation. Only if the scanned surfaces consist of extended, only slightly curved structures, the noise of the point cloud becomes nearly irrelevant as soon as the point cloud is replaced by a parametric or analytic description of the surface. In this pa...

3D modeling based on point clouds requires ground-filtering algorithms that separate ground from non-ground objects. This study presents two filtering algorithms. The first one is normal vectors. It has variants depending the procedure to compute k-nearest neighbors. second algorithm transforming cloud points into a voxel structure. To evaluate them, are compared according their execution time,...

Terrestrial laser scanners provide a three-dimensional sampled representation (i.e. point cloud) of the surfaces of objects. They have great potential to improve the measurement and representation of remote and widespread objects for applications such as engineering metrology, cultural heritage recording and forestry, among others. Prior to performing measurement tasks such as these, proper err...

Terrestrial laser scanning is of increasing importance for surveying and hazard assessments. Digital terrain models are generated using the resultant data to analyze surface processes. In order to determine the terrain surface as precisely as possible, it is often necessary to filter out points that do not represent the terrain surface. Examples are vegetation, vehicles, and animals. Filtering ...