Accuracy of tree diameter estimation from terrestrial laser scanning by circle-fitting methods
| Autor: | Tomáš Bucha, Milan Koreň, Martin Mokroš |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Global and Planetary Change
Mathematical optimization 010504 meteorology & atmospheric sciences Computer science Reference data (financial markets) Monte Carlo method 0211 other engineering and technologies Point cloud Diameter at breast height Mode (statistics) Centroid 02 engineering and technology Management Monitoring Policy and Law 01 natural sciences Minimum bounding box Calipers Computers in Earth Sciences Algorithm 021101 geological & geomatics engineering 0105 earth and related environmental sciences Earth-Surface Processes |
| Zdroj: | International Journal of Applied Earth Observation and Geoinformation. 63:122-128 |
| ISSN: | 1569-8432 |
| DOI: | 10.1016/j.jag.2017.07.015 |
| Popis: | This study compares the accuracies of diameter at breast height (DBH) estimations by three initial (minimum bounding box, centroid, and maximum distance) and two refining (Monte Carlo and optimal circle) circle-fitting methods The circle-fitting algorithms were evaluated in multi-scan mode and a simulated single-scan mode on 157 European beech trees (Fagus sylvatica L.). DBH measured by a calliper was used as reference data. Most of the studied circle-fitting algorithms significantly underestimated the mean DBH in both scanning modes. Only the Monte Carlo method in the single-scan mode significantly overestimated the mean DBH. The centroid method proved to be the least suitable and showed significantly different results from the other circle-fitting methods in both scanning modes. In multi-scan mode, the accuracy of the minimum bounding box method was not significantly different from the accuracies of the refining methods The accuracy of the maximum distance method was significantly different from the accuracies of the refining methods in both scanning modes. The accuracy of the Monte Carlo method was significantly different from the accuracy of the optimal circle method in only single-scan mode. The optimal circle method proved to be the most accurate circle-fitting method for DBH estimation from point clouds in both scanning modes. |
| Databáze: | OpenAIRE |
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