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oa Increasing the Accuracy of Terrestrial Laser Scanning by Using Corrections Determined from the Calibration Elements
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, International Conference of Young Professionals «GeoTerrace-2023», Oct 2023, Volume 2023, p.1 - 5
Abstract
In the last decade, Terrestrial Laser Scanning (TLS) technology has undergone significant development. New manufacturing companies have emerged and existing models have been enhanced. This technology has introduced new possibilities for efficient work processes. However, within the professional community, there is still no consensus on accuracy measurement and laser scanner calibration. The aim of this study is to investigate terrestrial laser scanners’ calibration parameters based on measurements conducted in a calibration field. In essence, scanner calibration is analogous to the inverse photogrammetric problem (determining exterior and interior orientation elements), where calibration elements are the unknown parameters. These parameters are determining together with coordinate systems transformation parameters in conventional calibration’s mathematic model, that causing a correlation between them. We propose a way to avoid such a correlation by separate calculation of transformation and calibration parameters. We also consider a way of linear solving of the calibration parameters computing problem using reverse coordinate systems transformation. It is also numerical solving made and overall accuracy improvement by using the proposed method of calibration is proven.