Appendix B
151
R int (i) = 1 −
F min
F max
(B.4)
Besides, the first two minima of the filtered F i (d) are detected at d 1 and d 2 (d 2
> d 1 ). The authors then defined pattern periodicity as:
R pos (i) = 1 −
1 −
2d 1
d 2
(B.5)
Finally, the overall pattern regularity is defined as the square of the product of
intensity and periodicity:
R(i) = [R int (i)R pos (i)]
2
(B.6)
Figure B.3 shows the pattern regularity R(i) calculated for the example pattern in
Fig. B.1.
Fig. B.3 The calculated pattern regularity R(i) for the pattern shown in Fig. B.1