大论文34.An efficient approach to 3D single tree-crown delineation in LiDAR data.pdfVIP

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大论文34.An efficient approach to 3D single tree-crown delineation in LiDAR data.pdf

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ISPRS Journal of Photogrammetry and Remote Sensing 108 (2015) 219–233 Contents lists available at ScienceDirect ISPRS Journal of Photogrammetry and Remote Sensing journal homepage: /locate/isprsjprs An efﬁcient approach to 3D single tree-crown delineation in LiDAR data ⇑ ˇ Domen Mongus , Borut Zalik University of Maribor, Faculty of Electrical Engineering and Computer Science, Smetanova 17, SI-2000 Maribor, Slovenia a r t i c l e i n f o a b s t r a c t Article history: This paper proposes a new method for 3D delineation of single tree-crowns in LiDAR data by exploiting Received 1 December 2014 the complementaries of treetop and tree trunk detections. A uniﬁed mathematical framework is provided Received in revised form 12 August 2015 based on the graph theory, allowing for all the segmentations to be achieved using marker-controlled Accepted 15 August 2015 watersheds. Treetops are deﬁned by detecting concave neighbourhoods within the canopy height model Available online 7 September 2015 using locally ﬁtted surfaces. These serve as markers for watershed segmentation of the canopy layer where possible oversegmentation is reduced by merging the regions based on their heights, areas, and Keywords: shapes. Additional tree crowns are delineated from mid- and under-storey layers based on tree trunk LiDAR