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isprsannals II 3 W4 189 2015

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Figure 1. Filtered (top) and tree-segmented (middle) point cloudand the reconstructed QSMs (bottom) of an English oak plot.
Figure 2. Locating stems. Top: ”Stem-like” cover sets whosenormals are nearly horizontal (blue) and the other cover sets (red)of the bottom 3 m
Figure 3. Approximate stems and their bases. Top: The stemcomponents of Fig. 2 are expanded downwards and their bottompart (blue) is selected as the base
Figure 6. Tree extraction correction. Left: Blue denotes the meet-ing of two trees (red and green)
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