Western Australian Palmprint Classification (WAPC) is a classification system for palm areas based on the numeric values of primary division and alphanumeric values of secondary division. Like Henry’s classification values, the WAPC values are also arranged in fractions.
Example of Australian Palmprint Classification Value
Here is an example of palmprint classification value by the Australian system proposed by Baird, in 1959.
Tripartite Division of Palm Print
For calculating the WAPC value, the palm area was first divided into three parts called as “Tripartite Division”.
Area 1: Thenar
The area stretched from half of the wrist area (separated by a lifeline) to the index finger.
Area 2: InterDigital
The area stretched from the ground of the index finger to the ring finger separated by a heart line.
Area 3: Hypothenar
Area left by the thenar and interdigital tripartite division of palm
How Australian Palmprint Classification System Works?
The Australian palmprint classification is the modified version of Henry’s classification system and uses the same values as in Henry’s classification.
The value of Australian Palmprint Classification System is divided into two major classifications:
- Primary Classification
- Secondary Classification
- First Division
- Second Division (secondary subclassification)
1. Primary Palmprint Classification
Like the Henry Primary classification system, in this classification, there are also sets of values for pattern types. However, the values are assigned when any type of pattern is seen on the interdigital palm area.
Note: In Henry’s primary classification, values are only allotted when prints are whorl but in the WAPC system, values are allotted when any pattern type is seen.
Finally, the resultant values are then added with 1 to come up final primary palmprint classification value.
[Table] Assigned Values of Primary Division Based on Pattern in Tripartite Area
|Pattern and Tripartite Area||Specific Value|
|Interdigital #5 finger delta to ulnar edge||1|
|Interdigital #4 finger delta to #3 finger delta||2|
|Interdigital #3 finger delta to radial edge||4|
|No pattern in Area||0|
2. Secondary Palmprint Classification System
The secondary classification is further subdivided into two subdivisions: (a) First Division and (b) Second Division.
A. First Division
- The pattern types of the thenar and hypothenar areas are considered.
- The values are expressed in fractions.
- Numerator: Pattern type in Thenar area
- Denominator: Pattern type in Hypothenar area
B. Second Division
- It is sometimes called secondary sub-classification.
- The pattern types in the thumb and index finger and the interdigital area are considered.
- The values are expressed in fractions:
- Numerator: Thumb to Index area
- Denominator: Interdigital
Note: Subsecondary divisions sometimes have another subdivision involved in ridge counting and ridge tracing. Their values are expressed to the right of second-division values.
Patterns Type and Respective Symbol/Code for the Australian Palmprint Classification System
|Joined arch||All four Area||J|
|Joined arch #1||Hypothenar only||J1|
|Joined arch #2||Hypothenar only||J2|
|Vertical arch #1||Hypothenar only||V1|
|Tented arch # 1||Hypothenar||T1|
|Tented arch # 2||Hypothenar||T2|
|Radial loop #1||Hypothenar||R1|
|Radial loop #2||Hypothenar||R2|
|Radial loop #3||Hypothenar||R3|
|Radial loop #4||Hypothenar||R4|
|Ulnar loop||All four area||U|
|Ulnar loop #1||Hypothenar||U1|
|Ulnar loop #2||Hypothenar||U2|
|Ulnar loop #3||Hypothenar||U3|
|Ulnar loop #4||Hypothenar||U4|
|Central Pocket Loop||Thenar|
- The Fingerprint Sourcebook By United States Department of Justice [Link]
- Touchless Palmprint Recognition Systems By Angelo Genovese, Vincenzo Piuri, Fabio Scotti [Link]
- A Modern Approach for Palmprint Recognition System [Link]
- Advanced Biometric Technologies By Stan Z. Li.
- Palm Print Recognition System: Need, Uses, and Working
FR Author Group at ForensicReader is a team of Forensic experts and scholars having B.Sc, M.Sc or Ph.D. degrees in Forensic Science. We published on topics on fingerprints, questioned documents, forensic medicine, toxicology, physical evidence, and related case studies. Know More.