Precise Measurement of Stem Diameter by Simulating the Path of Diameter Tape from Terrestrial Laser Scanning Data
Precise Measurement of Stem Diameter by Simulating the Path of Diameter Tape from Terrestrial Laser Scanning Data
复制标题
通过地面激光扫描数据模拟直径带的路径来精确测量茎直径
作者：
尤磊;唐守正;宋新宇;雷渊才;臧颢;娄明华;庄崇洋
树干直径的准确测量是森林资源清查的基础。地面激光扫描（TLS）作为毫米级测量工具，在茎径测量方面尚未达到毫米级精度。本研究的目的是开发一种从TLS数据中推导股骨柄直径的准确方法。采用直径尺测量茎径的方法。确定股骨柄在给定高度沿着的横截面。根据股骨柄横截面提取用于股骨柄直径检索的股骨柄点。在投影平面上计算提取出的干点的凸船体点。然后，在凸船体点上插值一条封闭的光滑曲线，模拟直径带的路径，根据模拟路径的长度计算出树干直径，并选取不同树种、不同性质的树干进行验证。与实测直径相比，该方法的RMSE为0.0909 cm，满足森林资源清查的精度要求。本研究提供了一种确定股骨柄横截面的方法，以及一种从TLS数据推导股骨柄直径的高效、精确的曲线拟合方法。论证了树干截面和凸船体点在树干直径反演中的重要性。
Accurate measurement of stem diameter is essential to forest inventory. As a millimeter-level measuring tool, terrestrial laser scanning (TLS) has not yet reached millimeter-level accuracy in stem diameter measurements. The objective of this study is to develop an accurate method for deriving the stem diameter from TLS data. The methodology of stem diameter measurement by diameter tape was adopted. The stem cross-section at a given height along the stem was determined. Stem points for stem diameter retrieval were extracted according to the stem cross-section. Convex hull points of the extracted stem points were calculated in a projection plane. Then, a closed smooth curve was interpolated onto the convex hull points to simulate the path of the diameter tape, and stem diameter was calculated based on the length of the simulated path. The stems of different tree species with different properties were selected to verify the presented method. Compared with the field-measured diameter, the RMSE of the method was 0.0909 cm, which satisfies the accuracy requirement for forest inventory. This study provided a method for determining the stem cross-section and an efficient and precise curve fitting method for deriving stem diameter from TLS data. The importance of the stem cross-section and convex hull points in stem diameter retrieval was demonstrated.
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影响因子：
4.3
作者：
LEE, ETY
通讯作者：
LEE, ETY
DOI：
--
发表时间：
2011
期刊：
--
影响因子：
--
作者：
Xinlian Liang;J. Hyyppä;V. Kankare;M. Holopainen
通讯作者：
Xinlian Liang;J. Hyyppä;V. Kankare;M. Holopainen
DOI：
10.3832/ifor1449-007
发表时间：
2015-03
期刊：
Iforest - Biogeosciences and Forestry
影响因子：
--
作者：
Nils Nölke;L. Fehrmann;S. J. I. Nengah;T. Tiryana;D. Seidel;C. Kleinn
通讯作者：
Nils Nölke;L. Fehrmann;S. J. I. Nengah;T. Tiryana;D. Seidel;C. Kleinn
DOI：
10.1201/b16812-9
发表时间：
2014
期刊：
--
影响因子：
--
作者：
M. V. Kreveld
通讯作者：
M. V. Kreveld
DOI：
10.1016/j.isprsjprs.2012.10.003
发表时间：
2013-01-01
影响因子：
12.7
作者：
Kankare, Ville;Holopainen, Markus;Alho, Petteri
通讯作者：
Alho, Petteri