Method for estimating rice plant height without ground surface detection using laser scanner measurement
Method for estimating rice plant height without ground surface detection using laser scanner measurement
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DOI：
10.1117/1.jrs.10.046018
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发表时间：
2016-05
影响因子：
1.7
通讯作者：
Anh Thu Thi Phan;Kazuyoshi Takahashi;A. Rikimaru;Y. Higuchi
中科院分区：
文献类型：
--
作者：
Anh Thu Thi Phan;Kazuyoshi Takahashi;A. Rikimaru;Y. Higuchi
抽象的。提出并评估了一种利用点云三维激光测距数据估算水稻植株高度的方法。使用水稻植株顶部的参考位置来估计水稻植株高度（H），从而避免了确定地面位置的需要。2013年和2014年，使用SICK LMS 200激光扫描仪在具有五种不同种植几何形状的试验田上进行了田间试验。百分位数分析确定了最接近水稻植株顶部的百分位数（pt = 1），第一个百分位数的垂直距离不受种植几何形状的影响。使用三个不同的百分位数等级（pb = 95、pb = 80和pb = 70）确定植物底部位置。相对垂直距离（rD）计算从水稻植株的顶部和底部位置之间的差异。这些与测量的H相关性很好，斜率大于1.0。2014年茎的数量增加导致坡度更陡。当植物底部位置离地面较近时，估计的H值更准确，pb = 95（r2> 0.87; RMSE ≤ 4cm）时获得的结果最好。总体而言，当pb = 95时，H通常比rD大16.0 cm。
Abstract. A method for estimating the height of rice plants, using three-dimensional laser range data from point clouds, is proposed and assessed. Rice plant height (H) is estimated using a reference position at the top of the rice plant, avoiding the need to determine the ground position. Field experiments were performed with a SICK LMS 200 laser scanner in 2013 and 2014 on a test field with five different planting geometries. Percentile analysis identified the closest percentile to the top of the rice plant (pt=1), with vertical distances at the first percentile unaffected by planting geometry. The plant bottom position was identified using three different percentile ranks (pb=95, pb =80, and pb =70). Relative vertical distances (rD) were computed from the difference between the top and bottom positions of the rice plant. These correlated well with measured H, with slopes greater than 1.0. A greater number of stems in 2014 led to steeper slopes. Estimated H was more accurate when plant bottom positions were closer to the ground surface, and the best results were obtained with pb=95 (r2>0.87; RMSE≈4 cm). Overall, H was typically 16.0 cm greater than rD with pb=95.