FD
fractal dimension
Ra
roughness (µm)
a x b
dimensions of the largest photograph
R
number of concentric photographs
N x M
number of points of the reconstructed surface
vertical coordinate of ijth reconstructed point
Y
number of dividers
| FD | fractal dimension |
| Ra | roughness (µm) |
| a x b | dimensions of the largest photograph |
| R | number of concentric photographs |
| N x M | number of points of the reconstructed surface |
|
| vertical coordinate of ijth reconstructed point |
| Y | number of dividers |