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Sensors 2015, 15(7), 15661-15683; doi:10.3390/s150715661

New Hybrid Algorithms for Estimating Tree Stem Diameters at Breast Height Using a Two Dimensional Terrestrial Laser Scanner

School of Technology, Beijing Forestry University, Beijing 100083, China
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Authors to whom correspondence should be addressed.
Academic Editor: Assefa M. Melesse
Received: 3 April 2015 / Revised: 23 June 2015 / Accepted: 26 June 2015 / Published: 2 July 2015
(This article belongs to the Section Remote Sensors)
View Full-Text   |   Download PDF [2299 KB, uploaded 2 July 2015]   |  

Abstract

In this paper, a new algorithm to improve the accuracy of estimating diameter at breast height (DBH) for tree trunks in forest areas is proposed. First, the information is collected by a two-dimensional terrestrial laser scanner (2DTLS), which emits laser pulses to generate a point cloud. After extraction and filtration, the laser point clusters of the trunks are obtained, which are optimized by an arithmetic means method. Then, an algebraic circle fitting algorithm in polar form is non-linearly optimized by the Levenberg-Marquardt method to form a new hybrid algorithm, which is used to acquire the diameters and positions of the trees. Compared with previous works, this proposed method improves the accuracy of diameter estimation of trees significantly and effectively reduces the calculation time. Moreover, the experimental results indicate that this method is stable and suitable for the most challenging conditions, which has practical significance in improving the operating efficiency of forest harvester and reducing the risk of causing accidents. View Full-Text
Keywords: hybrid circle fit algorithms; diameter at breast height estimation; two-dimensional terrestrial laser scanner hybrid circle fit algorithms; diameter at breast height estimation; two-dimensional terrestrial laser scanner
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Kong, J.; Ding, X.; Liu, J.; Yan, L.; Wang, J. New Hybrid Algorithms for Estimating Tree Stem Diameters at Breast Height Using a Two Dimensional Terrestrial Laser Scanner. Sensors 2015, 15, 15661-15683.

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