Table 1 Parameter definition and Calculation method.

From: Implication of high variance in germplasm characteristics

Parameter

Calculation method

Area

Area of selection in square pixels or in calibrated square units

Width

Width of the smallest rectangle enclosing the selection area

Height

Height of the smallest rectangle enclosing the selection area

Circularity

Circularity = 4ΠA/P2 with a value of 1.0 indicating a perfect circle. As the value approaches 0.0, it indicates an increasingly elongated shape. Values may not be valid for very small particles

Roundness

4 × [Area]/π × [Major axis]2