Fig. 7

THz images of a damaged leaf (Fig. 1g) based on water (a), solid matter (b), and gas (c) content. There is a perforation in the lower left side and some yellow mottling in the upper right side of the leaf (Fig. 1h–j). d–i Magnification of the damage details. The color represents the actual value of component content, and scale bars in a–c = 1 cm; d–i = 3 mm