ANN	Artificial neural network
BC	Brightness condition
CNN	Convolutional neural network
CTR	Correct segmentation rate of fruit trees
EMSRCM	Extraction on multi-scale retinex chromatic mapping method
ERGCM	RG chromatic extraction method
GLCM	Gray-level co-occurrence matrix
HE	Histogram equalization
HSI	Hue/saturation/intensity color space
IB	Insufficient brightness
imp	Relative G–R chromatic value or mapping
IoU	Intersection over union
LBP	Local binary pattern
LiDar	Light detection and ranging
LWCR	Large weed coverage rate
MSR	Multi-scale retinex method
MWCR	Medium weed coverage rate
NDVI	Normalized difference vegetation index
RGB	Red/green/blue color space
RoIs	Regions of interest (potential area of fruit trees)
SB	Sufficient brightness
SfM	Structure from motion
SRIHE	Selective regions intensity histogram equalization method
SVM	Support vector machine
SWCR	Small weed coverage rate
UAV	Unmanned aerial vehicle
UEJR	Under-extraction judgement rule
WCC	Weed coverage condition