Detection of Firmiana danxiaensis Canopies by a Customized Imaging System Mounted on an UAV Platform

Table 5

Accuracy assessment of the FD classification for the segmented patches.

(a) Confusion matrix at level 2

Reference class	Map class		Producer’s accuracy
	HSD-class	LSD-class
HSD-classes	248	53	82.4%
LSD-classes	23 (6)	278	92.4%
User’s accuracy	91.5%	84.0%	87.4%

Number of FD samples located in the cell. Kappa = 0.748.

(b) Confusion matrix at level 3

Reference class	Map class		Producer’s accuracy
	FD	Non-FD
FD	40	6	87.0%
Non-FD	18	33	64.7%
Accuracy	67.0%	84.7%	75.3%

Total number of FD: 52; number of FD correctly labeled: 40; accuracy for FD extraction: 76.9; Kappa = 0.535.