Comparison of creation 3D-models of objects based on materials from terrastrial laser scanning

Abstract

The purpose of the work was to assess the accuracy and functionality of the 3D model obtained as a result of the 3D scanning and post-processing. The article discusses 3D modeling methods and their characteristics. The procedure for working with a 3D scanner is studied and its principle of operation is given. Scan data was post-processed to create 3D models of varying accuracy. The equipment used for the scanning is a FARO Focus Laser S150 terrestrial laser scanner. SCENE was used for post-processing. The object for scanning with a ground laser scanner was six identical logs of wood. The functionality and accuracy of the models are determined. Three-dimensional scanning of the research objects was carried out from six stations to obtain a full-fledged point cloud. At each station, the device was installed in the working position on the horizontal level using the inclinometer readings. Scanning was performed after selecting the appropriate shooting mode. It was taken into account that during scanning, no object can touch the mirror unit, because during operation, the scanner rotates clockwise by 180 degrees. Scanning in this study was carried out in color, so the scanner rotated 360 degrees. Based on ground laser scanning data, 3D models of cut tree trunks of the same size were built. All models are built with different accuracy for comparison and determination of the optimal one in terms of reliability and load. The obtained research results, as well as the technique itself, can be used in forestry by forestry and various structures related to wood analysis. Also, if we consider only our industry, the research data can be useful for the cadastre of park territories, etc. In the course of the conducted research, 3D models with different accuracies and memory volumes were obtained, which can be used to solve the relevant tasks. The functionality of using models consists in choosing the number of polygons that will affect the amount of memory. It should be noted that the functionality of the models lies in the convenience of their use on any device, compared to point clouds, which are demanding on the hardware component of a computer. The accuracy of the models is high in all cases. This makes it possible to use them to solve many problems, taking into account the needs. So, we can conclude that the use of models is relevant due to high accuracy and functionality.