Table 3.

Overview of utilized image data

Organ	Background	Image category	Studies	$\sum$
Leaf	Plain	Scans	[6–8, 14, 15, 17, 22, 25, 36, 37, 54, 62, 65, 78–80, 97–99, 106, 122, 145, 155]	23
		Pseudo-scans	[11, 26, 27, 32, 39, 41, 43, 46, 66, 67, 72, 76, 82, 118, 141, 156–159]	19
		Scans + pseudo-scans	[1, 4, 5, 16, 21, 23, 24, 28, 40, 48, 53, 56, 58, 59, 73, 77, 81, 87, 89, 91–94, 96, 103, 111, 114–116, 119, 121, 132–136, 139, 140, 143, 144, 146, 147, 150, 154]	43
		Illustrated leaf images	[100, 101, 107, 108]	4
		[No information]	[10, 31, 38, 42, 45, 110]	6
	Natural	Photos	[74, 102, 130]	3
	Plain + natural	Scans + pseudo-scans + photos	[18–20, 68, 85, 120, 137, 138, 148]	9
Flower	Natural	Photos	[3, 29, 30, 57, 60, 64, 68, 104, 105, 112, 117, 128, 129, 149]	14
Stem, fruit, full plant	Natural	Photos	[68]	1