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Vol. 164, Issue 2, February 2014, pp. 65-70

 

Bullet

 

Extraction of Trees Stem Diameters at Breast Height by Terrestrial Laser Sensor for Selective Cutting
 

Yili ZHENG, JinHao LIU, Sen ZHANG, Taotao GE

School of Technology, Beijing Forestry University, Beijing, 100083, China
Tel.: 010-62336398, fax: 010-62336398

E-mail: zhengyili@bjfu.edu.cn

 

Received: 22 November 2013 /Accepted: 28 January 2014 /Published: 28 February 2014

Digital Sensors and Sensor Sysstems

 

Abstract: In order to assist the operators of the logging harvester automatically and quickly select the appropriate trees for selective cutting, using two-dimensional laser scanner and inertial measurement system, the two-dimensional cloud points of the trunks at breast-height are obtained for several trees. After projection, clustering, linear transformation and fitting for the point clouds data, the parameters of the breast-height-diameters and center locations of the trees are obtained. The calculation is implemented in MATLAB by Polak-Ribiere-Polyak (PRP) conjugate gradient algorithm and the result is shown in VC++ environment. Using this method, absolute errors of the breast-height- diameters and center locations are 2.3 cm and (12.4, 11.4) cm respectively, and meet the requirements on the automatically selective cutting of the logging harvester.

 

Keywords: Laser measurement, Selective cutting, Plantation forest.

 

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