A new framework for GEOBIA: accurate individual plant extraction and detection using high-resolution RGB data from UAVs  

作　　者：Kaile Yang Zhangxi Ye Huan Liu Xiaoyu Su Chenhui Yu Houxi Zhang Riwen Lai 

机构地区：[1]College of Forestry,Fujian Agriculture and Forestry University,Fuzhou,350028,People’s Republic of China [2]University Key Lab for Geomatics Technology and Optimized Resources Utilization in Fujian Province,No.15 Shangxiadian Road,Fuzhou,350002,Fujian,People’s Republic of China [3]Key Laboratory of State Forestry and Grassland Administration on Soil and Water Conservation of Red Soil Region in Southern China,Fuzhou,350002,People’s Republic of China [4]Cross-Strait Collaborative Innovation Center of Soil and Water Conservation,Fuzhou,350002,People’s Republic of China [5]National Positioning Observation and Research Station of Red Soil Hill Ecosystem in Changting,Fuzhou,350002,People’s Republic of China

出　　处：《International Journal of Digital Earth》2023年第1期2599-2622,共24页国际数字地球学报（英文）

基　　金：supported by the Forestry Peak Discipline Construction Project of Fujian Agriculture and Forestry University[grant number 72202200205];National Natural Science Foundation of China[grant number 31901298];the Natural Science Foundation of Fujian Province[grant number 2021J01059];Fujian Agriculture and Forestry University Innovation Foundation[grant number KFb22033XA].

摘　　要：Citrus(Citrus reticulata),which is an important economic crop worldwide,is often managed in a labor-intensive and inefficient manner in developing countries,thereby necessitating more rapid and accurate alternatives tofield surveys for improved crop management.In this study,we propose a novel method for individual tree segmentation from unmanned aerial vehicle remote sensing(RS)using a combination of geographic object-based image analysis(GEOBIA)and layer-adaptive Euclidean distance transformation-based watershed segmentation(LAEDT-WS).First,we use a GEOBIA support vector machine classifier that is optimized for features and parameters to identify the boundaries of citrus tree canopies accurately by generating mask images.Thereafter,our LAEDT workflow separates connected canopies and facilitates the accurate segmentation of individual canopies using WS.Our method exhibited an F1-score improvement of 10.75%compared to the traditional WS method based on the canopy height model.Furthermore,it achieved 0.01%and 1.38%higher F1-scores than the state-of-the-art deep learning detection networks YOLOX and YOLACT,respectively,on the test plot.Our method can be extended to detect larger-scale or more complex structured crops or economic plants by introducing morefinely detailed and transferable RS images,such as high-resolution or LiDAR-derived images,to improve the mask base map.

关 键 词：Crop management unmanned aerial vehicle remote sensing watershed segmentation geographic object-based image analysis 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]