Figure 2

Setup used in the greenhouse. (A) Camera, infrared diodes and a soybean leaf fixed in a metal frame; (B) Close-up view of a fixed soybean leaf with attached black beads and threads.
Setup used in the greenhouse. (A) Camera, infrared diodes and a soybean leaf fixed in a metal frame; (B) Close-up view of a fixed soybean leaf with attached black beads and threads.