Calibration of a Terrestrial Laser Scanner - Institute of Geodesy and ...

128 6. Applications of Terrestrial Laser Scanningleft and right sides. The shadows produced by the objects show the scanning direction and homogeneousorientations.The visualized section has a length of nearly 37 m, the width is about 5 m and the height isabout 3 m. The varying grayscale values of the point cloud are based on the intensity values acquired bythe laser scanner. The intensity values are influenced by several parameter, e.g. the range, the reflectivityof the object, and the angle of incidence between the surface normal of the objectand the laser beam.Figure 6.16: Point cloud of test tunnel based on kinematic surveying (inside view).In Figure 6.17, the ceiling was faded out to catch a better view from outside to inside of the test tunnel. Theobjects as well as the object shadows can be roughly recognized. The left side of the tunnel was equippedwith some geodetic installations, e.g.wall and someposters. Ten posters at the right side can be seen.pillars, granite tables and instruments. The right side shows only aFigure 6.17: Point cloud of test tunnel based on kinematic surveying (outside view).