Canopy Extraction and Height Estimation of Trees in a Shelter Forest Based on Fusion of an Airborne Multispectral Image and Photogrammetric Point Cloud

Figure 5

The performance of different extraction methods on the crown of individual trees in the study area: (a–c) multispectral raw image data for study areas 1-3 (the green polygonal area represents a reference drawing of the tree canopy drawn by experienced researchers); (d–f) the red polygonal area is the crown extracted results using the method of combining LMF with MCWS in study areas 1-3; (g–i) the blue polygonal area is the crown extracted results using the FMSD-OBIA method in study areas 1-3.

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