Page 14 - Read The Found Prints Fingerprint Analysys

The Henry

Classification System

It is necessary for fingerprint analysis to have a absence of the whorl pattern, each finger is
method of classification. There are several different assigned a value.
classification systems used in the world. The most
popular tenprint classification systems include the If a whorl pattern is present on fingers number one
Roscher system (implemented in Germany and and two they are assigned a value of 16, three and four
Japan), the Juan Vucetich system (used in Argentina), a value of 8, five and six a value of 4, seven and eight a
and the Henry Classification System (used in most value of 2, and the last two, nine and ten, a value of 1.
English-spoken countries).
If loops and arches are present they are given the
The Henry Classification System uses the loops, value of 0. Then the odd numbered fingers and even
whorls, and arches approach. The primary numbered fingers values are summed separately.
classification of the Henry system categorizes ten- To the total value of each, odd and even, the value 1
print fingerprints into one of the primary groups, is added. The sum of odd finger value + 1 is divided
with 1,024 possible groups. by the sum of even finger value + 1, which gives the
fraction that represents the primary group ratio. On
As seen in the table below, each finger is numbered the table, a sample individual has whorl patterns on
from one to ten beginning from the right thumb, the right index finger, right ring finger, left index finger,
numbered one, and ending with the left pinky, and left pinky. As displayed below, that individual
numbered ten. Depending on the presence or would have a 3:26 (or 3/26) grouping ratio.

R R R R R L L L L L
THUMB INDEX MIDDLE RING PINKY THUMB INDEX MIDDLE RING PINKY

ASSIGNED 1 2 3 4 5 6 7 8 9 10
NUMBER

VALUE (IF WHORL 16 16 8 8 4 4 2 2 1 1
IS PRESENT)
EXAMPLE 0 16 0 8 0 0 2 0 0 1

HENRY Sum of Odd finger value + 1 = Grouping Ratio
CLASSIFICATION
FORMULA Sum of Even finger value + 1

GROUPING RATIO 0 + 0 + 0 + 2 + 0 + 1 = 3
FOR EXAMPLE 16 + 8 + 0 + 0+ 1 + 1 26

14 THE MYSTERY OF LYLE AND LOUISE