Development of a Rapid and Precise Method of Digital Image Analysis to Quantify Canopy Density and Structural Complexity

Table 1

Interobserver variability in quantifying canopy density at 10 different sample locations using three traditional methods and digital image analysis.

Method	Difference between highest and lowest canopy estimates at each sample location (%points)			Coefficient of Variation (%)
	Minimum	Maximum	Mean	Minimum	Maximum	Mean
Visual estimation	28	75	50	11.63	50.92	26.37
Cross-wire tube	29	62	42	16.58	27.38	18.86
Moosehorn	30	62	39	11.13	26.97	16.96
Digital image analysis	6	17	10	2.97	6.66	3.74