Fig. 2
From: Estimating urban above ground biomass with multi-scale LiDAR
Individual tree detection work flow (i–vi) for segmenting ALS data into tree crowns, the bottom panel shows a TLS derived crown map as a comparison. Letters in panels 4 and 5 refer to common issues with the ITD crown segmentation where; A a small crown subsumed into a larger one, B remaining building points increasing crown area, C over segmentation of crowns, D commission errors, E under segmentation of crowns, and F omission errors (particularly of suppressed trees). Presented data is of Malet Street (Table 1)