Mapping Soil Surface Macropores Using Infrared Thermography: An Exploratory Laboratory Study

Figure 4

Relation between threshold temperature () and the number of macropores detected with thermography, for the four scenarios: (a) Scenario A; (b) Scenario B; (c) Scenario C; and (d) Scenario D. Temperature cumulative frequency distribution curves are also plotted, up to 2.5%. Critical threshold temperature () and corresponding critical threshold percentage of pixels () are identified.

(a)

(b)

(c)

(d)