Table 3.

Characteristics of the data sets used for the calibration and validation of the algorithm. Statistics of the stem density are indicated for each data set, including minimum (Min), mean (Mean), maximum (Max), range (Range), standard deviation (SD), and coefficient of variation (CV) of the stem density.

	Number of image extracts				Stem density (stem/m2)
Dataset	Name	Gréoux	Clermont	Min	Mean	Max	Range	SD	CV (%)
Calibration	Cgc	132	416	112	493	991	879	132	26.77
Validation	Vgc	66	208	161	561	906	745	179	31.91
Calibration	Cg	132		112	357	605	493	77	21.57
Validation	Vg	66		161	352	601	440	78	22.16
Calibration	Cc		416	308	549	991	683	101	18.04
Validation	Vc		208	373	662	906	533	116	17.52