Figure 3From: Diel leaf growth of soybean: a novel method to analyze two-dimensional leaf expansion in high temporal resolution based on a marker tracking approach (Martrack Leaf)Principle sketch of setup. (A) Top view of soybean leaf fixed with strings in a metal frame with marker beads attached at the leaf margin, the artificial background is shown in gray; (B) Whole setup in top side view with camera, infrared LED clusters and fixed soybean leaf.Back to article page