Skip to main content

Table 2 Significant tests for slopes of regression models with the same ETM extents

From: Sky-canopy border length, exposure and thresholding influence accuracy of hemispherical photography for complex plant canopies

Type of CHPs ETM extent DFW DFB F value P value
Model CHPs − 1 64 3 34.899 0.007
+ 1 64 3 12.444 0.030
+ 2 64 3 32.819 0.007
+ 3 64 3 9.870 0.041
+ 4 64 3 5.244 0.098
− 1 134 2 5.099 0.178
Real CHPs + 1 134 2 9.742 0.097
+ 2 134 2 2.087 0.380
+ 3 134 2 0.561 0.828
  1. These regression model are shown in Figs. 9 and 10
  2. CHP canopy hemispherical photograph, DFW degree of freedom within groups, DFB degree of freedom between groups