Table 4.

Advantages and limitations of common sensors implemented in acquiring of geometric traits.

Sensors	Distance of Point-to-Point	Advantages	Limitations
Stereo vision system	Various resolutions	Low cost Suitable for unmanned aerial vehicles (UAV)	Heavy computation Sensitive to strong light
Lidar/laser sensor (e.g., Trimble TX8)	7.5 mm at 30 m	Long measurement range High resolution	High cost Limited information on occlusions and shadows
Range camera (e.g., Kinect v 2.0)	>4.0 mm at more than 4 m	Low cost High frame rate	Sensitive to strong light Low resolution
Hand held laser scanner (e.g., FastSCAN)	0.178 mm in the range of 200 mm	High resolution High accuracy for 3D model	Short measurement range Hand held