Development of a Rapid and Precise Method of Digital Image Analysis to Quantify Canopy Density and Structural Complexity
Figure 4
Interobserver variability in canopy estimates of ten observers surveying ten sample locations: (a) visually, (b) with a sighting tube (100 observations per person per sample location), (c) using a moosehorn, and (d) using digital image analysis. The long vertical line shows the 95% trimmed range, the box shows the interquartile range, the solid black horizontal lines show the median, and open circles show outliers (>1.5 standard deviations from the mean).
