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首页> 美国卫生研究院文献>Sensors (Basel Switzerland) >Tree Height Growth Measurement with Single-Scan Airborne Static Terrestrial and Mobile Laser Scanning
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Tree Height Growth Measurement with Single-Scan Airborne Static Terrestrial and Mobile Laser Scanning

机译：使用单扫描机载地面静止和移动激光扫描的树高生长测量

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摘要

This study explores the feasibility of applying single-scan airborne, static terrestrial and mobile laser scanning for improving the accuracy of tree height growth measurement. Specifically, compared to the traditional works on forest growth inventory with airborne laser scanning, two issues are regarded: “Can the new technique characterize the height growth for each individual tree?” and “Can this technique refine the minimum growth-discernable temporal interval further?” To solve these two puzzles, the sampling principles of the three laser scanning modes were first examined, and their error sources against the task of tree-top capturing were also analyzed. Next, the three-year growths of 58 Nordic maple trees (Crimson King) for test were intermittently surveyed with one type of laser scanning each time and then analyzed by statistics. The evaluations show that the height growth of each individual tree still cannot be reliably characterized even by single-scan terrestrial laser scanning, and statistical analysis is necessary in this scenario. After Gaussian regression, it is found that the minimum temporal interval with distinguishable tree height growths can be refined into one month based on terrestrial laser scanning, far better than the two years deduced in the previous works based on airborne laser scanning. The associated mean growth was detected to be about 0.12 m. Moreover, the parameter of tree height generally under-estimated by airborne and even mobile laser scanning can be relatively revised by means of introducing static terrestrial laser scanning data. Overall, the effectiveness of the proposed technique is primarily validated.
机译：这项研究探讨了应用单次扫描机载，静态地面和移动激光扫描来提高树高生长测量精度的可行性。具体而言，与传统的机载激光扫描森林生长调查工作相比，有两个问题需要考虑：“新技术能否表征每棵树的高度增长？”和“该技术是否可以进一步细化最小的可识别增长时间间隔？”为了解决这两个难题，首先研究了三种激光扫描模式的采样原理，并分析了它们对树顶捕获任务的误差来源。接下来，用一种类型的激光扫描仪间歇性地调查58棵北欧枫树（深红色金）的三年生长情况，然后进行统计分析。评估表明，即使通过单次扫描地面激光扫描，仍无法可靠地表征每棵树的高度增长，在这种情况下，必须进行统计分析。经过高斯回归后，发现可以通过地面激光扫描将具有明显树高增长的最小时间间隔精简为一个月，远胜于先前基于机载激光扫描的工作推论的两年。相关的平均生长被检测为约0.12 m。此外，可以通过引入静态地面激光扫描数据来相对修正通常由机载甚至移动激光扫描低估的树高参数。总体而言，所提出技术的有效性得到了初步验证。

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