Table 1 Morphometrical parameters used in the analysis of the theoretical cells.
Parameter | Units | Explanation |
|---|---|---|
Perim | pixels | Perimeter calculated from the centres of the boundary pixels |
Area | pixels2 | The area inside the polygon defined by the perimeter |
MinR | pixels | Radius of the inscribed circle centred at the centre of mass |
MaxR | pixels | Radius of the enclosing circle centred at the centre of mass |
Feret | pixels | Largest axis length |
Breadth | pixels | The largest axis perpendicular to the Feret diameter |
CHull | pixels | Convex Hull or convex polygon calculated from pixel centres |
CArea | pixels2 | Area of the Convex Hull polygon |
MBCRadius | pixels | Radius of the Minimal Bounding Circle |
AspRatio | none | Aspect Ratio = Feret/Breadth |
Circ | none | Circularity = 4*Ï€*Area/Perimeter2, also called form factor |
Roundness | none | Roundness = 4*Area/(Ï€*Feret2) |
AreaEquivD | pixels | Area of circle with equivalent diameter = sqrt((4/Ï€)*Area) |
PerimEquivD | none | Perimeter of circle with equivalent diameter = Area/Ï€ |
EquivEllipseAr | pixels2 | Equivalent Ellipse Area = (Ï€*Feret*Breadth)/4 |
Compactness | none | Compactness: sqrt((4/Ï€)*Area)/Feret |
Solidity | none | Solidity = Area/Convex_Area |
Concavity | pixels2 | Concavity = Convex_Area - Area |
Convexity | none | Convexity = Convex_Hull/Perimeter |
Shape | none | Shape = Perimeter2/Area |
RFactor | none | RFactor = Convex_Hull/(Feret*Ï€) |
ModRatio | none | Modification Ratio = (2*MinR)/Feret |
Sphericity | none | Sphericity = MinR/MaxR |
ArBBox | pixels2 | ArBBox = Feret*Breadth, area of the box along Feret diameter |
Rectang | none | Rectangularity = Area/ArBBox |