Machine Learning for Estimating Leaf Dust Retention Based on Hyperspectral Measurements

Table 1

Physical characteristics of the leaf surface.

Plants	Characteristics of the leaf surface				Microscopic feature	Dust retention feature
	Color	Size	Shape	Texture
GL	Golden yellow or glossy dark green	3–8 cm	Ellipse	Leathery, fleshy and entire leaf, two sides smooth and glabrous	Many depressions in leaf caused by unequal-sized graininess wax, that lots of particle can adhere to them	Massive stratification
LC	Dull-red or green	2–5 cm	Oval or oblate ellipsoid, round root but deflect, asymmetric	Leathery and entire leaf, stellate leaf trichome in two sides	Rough leaf surface with villus	Mosaic particle
CF	Green or purplish red	25–50 cm	Ellipse to elliptical lanceolate	Smooth leaf surface	Cell profile distinct and aligned	Sporadic mosaic particle