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Accuracy of tree mapping based on hand-held laser scanning comparing leaf-on and leaf-off conditions in mixed forests

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Journal of forestry Research 2024年第5期35卷 14-25页

作者： Frederico Tupinambá-Simões Adrián Pascual Juan Guerra-Hernández Cristóbal Ordóñez Tiago de Conto Felipe Bravo iuFOR Sustainable Forest Management Research InstituteUniversity of Valladolid&INIAValladolidSpain Department of Geographical Sciences University of MarylandCollege ParkMD 20742USA Forest Research Centre School of AgricultureUniversity of LisbonTapada da Ajuda1349‑017 LisbonPortugal

The use of mobile laser scanning to survey forest ecosystems is a promising,scalable technology to describe forest 3D structures at high *** confirm the con-sistency in the retrieval of forest structural parameters using hand-held laser scanning(HLS),before operationalizing the method,confirming the data is *** analyzed the per-formance of tree-level mapping based on HLS under differ-ent phenology conditions on a mixed forest in western Spain comprising Pinus pinaster and two deciduous species,Alnus glutinosa and Quercus *** area was surveyed twice during the growing season(July 2022)and once in the deciduous season(February 2022)using several scan-ning *** reference data(418 trees,15 snags)was used to calibrate the HLS data and to assess the influence of phenology when converting 3D data into tree-level attrib-utes(DBH,height and volume).The HLS-based workflow was robust at isolating tree positions and recognizing stems despite changes in ***-six percent of all pairs matched below 65 *** DBH,phenology barely altered *** observed a strong agreement when comparing HLS-based tree height *** values exceeded 2 m when comparing height measurements,confirming height data should be carefully used as reference in remote sensing-based inventories,especially for deciduous *** volume was more precise for pines(r=0.95,and rela-tive RMSE=21.3–23.8%)compared to deciduous species(r=0.91–0.96,and relative RMSE=27.3–30.5%).HLS data and the forest structural complexity tool performed remark-ably,especially in tree positioning considering mixed forests and mixed phenology conditions.

关键词： precision forestry Forest monitoring Mobile laser scanning Forest inventory

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Using mixed integer programming and airborne laser scanning to generate forest management units

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Journal of forestry Research 2022年第1期33卷 217-226页

作者： Adrián Pascual Sándor FTóth Forest Research Centre School of AgricultureUniversity of LisbonTapada da Ajuda1349-017 LisboaPortugal School of Forest Sciences University of Eastern FinlandP.O.Box 11180101 JoensuuFinland School of Environmental and Forest Sciences University of WashingtonSeattleWAUSA

Airborne laser scanning(ALS)has been widely applied to estimate tree and forest attributes,but it can also drive the segmentation of forest *** algorithms are the dominant technique in segmentation but spatial optimization using exact methods remains *** study presents a novel approach to segmentation based on mixed integer programming to create forest management units(FMUs).This investigation focuses on using raster information derived from ALS *** mainstream clustering algorithms were compared to the new MIP formula that simultaneously accounts for area and adjacency restrictions,FMUs size and homogeneity in terms of vegetation *** optimal problem solution was found when using less than 150 cells,showing the problem formulation is *** results for MIP were better than for the clustering algorithms;FMUs were more compact based on the intravariation of canopy height and the variability in size was *** MIP model allows the user to strictly control the size of FMUs,which is not possible in heuristic optimization and in the clustering algorithms *** definition of forest management units based on remote sensing data is an important operation and our study pioneers the use of MIP ALS-based optimal segmentation.

关键词： Segmentation precision forestry Optimization Mathematical programming Airborne laser scanning

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From agricultural engineering and forestry engineering to biomechinfotronic engineering

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International Journal of Agricultural and Biological Engineering 2009年第1期2卷 72-78页

作者： Zheng Jiaqiang Zhou Hongping Xu Youlin Xu Linyun College of Mechanical&Electronic Engineering Nanjing Forestry UniversityNanjing 210037China

The deterioration of global environment,decreasing of biological diversity,increasing of natural disasters,exhausting of biological resources and acceleration of desertification emphasize the need to provide the human-beings with the suitable ***,precision agriculture and precision forestry have been emphasized to obtain the maximum output with minimum input and the least impact on the environment,so agricultural and forestry engineering systems require multi-disciplinary design groups to deal with some common interests and the concept of biomechinfotronics is *** word“biomechinfotronic”is introduced to describe the multidisciplinary aspects of this complex *** the paper,the prospects,mission analysis,education system,research areas of biomechinfotronics are *** particular characteristics of biomechinfotronics are the synergistic integration of biological engineering with mechatronics,bioinformatics,infotronics,bioelectronics and intelligent computer systems for conducting common research and development and for recruiting and training students with wide specialties.

关键词： agricultural and forestry engineering precision agriculture precision forestry biomechinfotronics multi-disciplinary sustainable development

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基于机器视觉的室内模拟农药精确对靶施用系统研究

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南京林业大学学报(自然科学版) 2003年第4期27卷 34-34页

作者：葛玉峰南京林业大学机械电子工程学院2003年硕士毕业生南京林业大学机械电子工程学院江苏南京210037

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