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Table 1 Definitions of nineteen leaf shape-related traits

From: A high-throughput stereo-imaging system for quantifying rape leaf traits during the seedling stage

Classification Variable Definition
Scale-invariant traits AA The aspect ratio of leaf minimum circumscribed box
R The ratio of leaf area to minimum circumscribed box area
AC The ratio of leaf area to leaf convex hull area
PC The ratio of leaf circumference to leaf convex hull perimeter
S The ratio of leaf area to the square of leaf convex hull perimeter
E The ratio of long axis of ellipse to short axis of ellipse
FF The ratio of leaf area to the square of leaf perimeter
PAR The ratio of leaf circumference to leaf area
SFD Reflect the effectiveness of the occupies space without image cropping [53]
IFD Reflect the effectiveness of the occupies space with image cropping [53]
C The ratio of inscribed circle radius to circumscribed circle radius
Cavity traits NIC The number of inner cavities
APIC The average perimeter of inner cavities
AAIC The average area of inner cavities
Margin related traits TNI Total number of indents
ENI Effective number of indents
ADI The average depth of indents
ADEI The average depth of effective indents
AVE The average calculated value of effectiveness