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当前位置: 首页 > 文章 > 依据地面三维激光扫描及点云数据建立的白桦树干削度方程 东北林业大学学报 2018 (12) 58-63
Position: Home > Articles > Stem Taper Function of Betula platyphylla with Terrestrial 3D Laser Scanning Journal of Northeast Forestry University 2018 (12) 58-63

依据地面三维激光扫描及点云数据建立的白桦树干削度方程

作  者：
杨玉泽;张珊珊;林文树
单  位：
东北林业大学
关键词：
白桦;树干削度方程;地面三维激光扫描;点云数据
摘  要：
以黑龙江省白桦(Betula platyphylla)次生林为研究对象,利用三维激光扫描及点云数据处理技术获取树干点云数据,对比分析了点云数据和解析木测量数据,获取每米间隔的树干直径的差异;选用6种削度模型分别进行拟合,得到白桦树种的树干削度方程;采用决定系数(R2)、平均绝对误差(Eaa)、误差平方和(Ess)、均方根误差(E_(rms))对各模型的拟合效果和预测能力进行评价分析。结果表明:点云数据提取得到每米处树干直径略大于解析木测量的直径,平均E_(rms)为1.12 cm。两组数据中6种模型的整体拟合效果均相对较高,R2均在0.80以上,平均E_(rms)为0.758;点云数据拟合的削度方程参数与解析木测量数据拟合的削度方程参数相近,且模型拟合效果排序一致;通过比较得到白桦最优削度方程模型,经过样本检验后得出依据三维激光扫描及点云数据建立的树干削度方程具有较高的拟合精度。
译  名：
Stem Taper Function of Betula platyphylla with Terrestrial 3D Laser Scanning
作  者：
Yang Yuze;Zhang Shanshan;Lin Wenshu;Northeast Forestry University;
单  位：
Yang Yuze%Zhang Shanshan%Lin Wenshu%Northeast Forestry University
关键词：
Betula platyphylla;;Stem taper function;;Terrestrial 3D laser scanning;;Point cloud data
摘  要：
The Betula platyphylla secondary forest of Heilongjiang Province was taken as the research object,and three-dimensional laser scanning and point cloud data processing techniques were used to obtain the stem point cloud data. The difference of the stem diameter per meter was obtained by comparing and analyzing between the analytical wood measured data and point cloud data. Six kinds of tapering models were used to fit the equations to obtain the stem taper function of the birch species. Indicators such as coefficient of determination( R2),mean absolute error( Eaa),sum of squares for error( Ess) and root mean squared error( E_(rms)) were used to evaluate the model's fitting effect and predictability. Results showed that:( 1) The stem diameter measured by point cloud data was slightly greater than that of the measured value with average E_(rms) of 1.12 cm.( 2) The overall fitting effects of the six models for the two data sets were relatively higher with average coefficient of determination above 0.80 and average E_(rms)of 0.758. The parameters of the stem taper function fitted by the point cloud data were similar to those of the analytical wood measured data,and the order of the fitting effect of the models was the same. By comparison,the optimal stem taper function model for B. platyphylla was obtained. After sample test,the stem taper function established with 3 D laser scanning and point cloud data were demonstrated to have a higher fitting precision.

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