The steps in taking a ridge count from a fingerprint are as
follows:
1. Draw an imaginary line from the center of the core to the
edge of the delta
2. Count all the ridges that touch or cross the imaginary
line
3. The core and delta should not be included in the counting
4. Incipient ridges are never to be counted regardless of
where they appear
NUMERICAL VALUE
ASSIGNED TO RIDGES
An island ridge – One count
A short ridge – One count
A long ridge – One count
Abrupt ending ridge – One count
A ridge that bifurcates across the imaginary line – Two counts
A bifurcating ridge whose point of origin is on the line of
count – Two counts
Eyelet ridge – Two counts
Intersection of two enclosures – Two counts
The core is located on ending ridge which touches the inside
of the innermost recurving – Four counts
