Paper Info
Title
Georeferenced scanning system to estimate the leaf wall area in tree crops.
Abstract
This paper presents the use of a terrestrial light detection and ranging (LiDAR) system to scan the vegetation of tree crops to estimate the so-called pixelated leaf wall area (PLWA). Scanning rows laterally and considering only the half-canopy vegetation to the line of the trunks, PLWA refers to the vertical projected area without gaps detected by LiDAR. As defined, PLWA may be different depending on the side from which the LiDAR is applied. The system is completed by a real-time kinematic global positioning system (RTK-GPS) sensor and an inertial measurement unit (IMU) sensor for positioning. At the end, a total leaf wall area (LWA) is computed and assigned to the X, Y position of each vertical scan. The final value of the area depends on the distance between two consecutive scans (or horizontal resolution), as well as the number of intercepted points within each scan, since PLWA is only computed when the laser beam detects vegetation. To verify system performance, tests were conducted related to the georeferencing task and synchronization problems between GPS time and central processing unit (CPU) time. Despite this, the overall accuracy of the system is generally acceptable. The Leaf Area Index (LAI) can then be estimated using PLWA as an explanatory variable in appropriate linear regression models.
Year
DOI
Venue
2015
10.3390/s150408382
SENSORS
Keywords
Field
DocType
lidar
Leaf area index,Vegetation,Kinematics,Projected area,Remote sensing,Lidar,Ranging,Inertial measurement unit,Global Positioning System,Engineering
Journal
Volume
Issue
ISSN
15
4.0
1424-8220
Citations 
PageRank 
References 
5
0.56
3
Authors
7
Name
Order
Citations
PageRank
Ignacio Martínez1336.53
jaume arno2193.05
alexandre escola39912.36
Ricardo Sanz4285.28
Joan Masip-Vilalta550.56
Joaquim Company-Messa650.56
joan r rosellpolo76510.71