18. Reference Information
No.99MBB122A
18-45
2. Obtain all of the peaks and valleys for the entire evaluation length.
Peaks are defined as the highest point between two valleys whose height is Hmin or
greater. Valleys are the lowest point between two peaks. These peaks and valleys are
used for the entire evaluation length.
Peak, valley
The space between two peaks is treated as 1 motif. Motifs appear based on the
following lengths and depths. The horizontal length of the unfiltered profile (motif
length ARi), the vertical distances from the 2 peaks to the floor (motif depth Hj and Hj
+ 1), and the shallower of the 2 motif depths, T. (In the following figure, Hj+1 is T.㧕
Motif
3. Compare and combine consecutive roughness motifs.
Combining motifs is subject to the following 4 conditions. Motifs can be combined only
when they meet all of the conditions. Repeat this operation until no more motifs can
be combined.
(Condition 1)
Among adjacent peaks, keep the tallest one. (If the center peak is taller than both
those on the right and left, do not combine motifs.)
Combining roughness motifs
P
P
P
P
V
V
V
V
H
min
P: Peak
V: Valley
H
H
+1
ARi
Cannot combine motifs Can combine motifs
P1
P2
P3
P2
P1
P3
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