Table 2.

Parameters for pellet characterisation

	Parameter	Definition
Core region	Fullness	Ratio of actual area of the particle to convex area; = 1 for pellets without hairy regions
	Circularity	Deviation from a true circle, derived from area and perimeter
	Core area	Encompasses core equivalent diameter
Hairy region	Roughness	Irregularity of the perimeter of an object, obtained from circularity measurement around an object boundary
	Equivalent diameter	Diameter of a circle having the same area as the pellet