Sample (pixel) Area (pixel) Perimeter (pixel) Radius (pixel) Circumference (pixel)  
(a) 4232 240.6 36.7 230.6 1.04
(b) 3203 209.1 31.9 200.6 1.04
(c) 2767 195.2 29.6 186.4 1.04
(d) 2431 209.2 27.8 174.7 1.20
(e) 3787 265.0 34.7 218.1 1.21
(f) 2947 236.1 30.6 192.4 1.22
Table 1: Quantitative evaluation of cell surface roughness (Figure 2).