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Digital method for lip print analysis: A New approach.

Rachana V Prabhu1, Ajit Dinkar, Vishnudas Prabhu

  • 1Department of Oral Medicine and Radiology, Yenepoya Dental College, Yenepoya University, Mangalore, Karnataka, India.

Journal of Forensic Dental Sciences
|November 21, 2013
PubMed
Summary

Lip prints are unique to each individual, confirmed by a novel digital analysis method. This technique, using a weighted value scoring system, establishes a standard for verifying lip print uniqueness and aids in forensic identification.

Keywords:
Cheiloscopydigital analysislip printslip scoreweighted value

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Area of Science:

  • Forensic Science
  • Biometrics
  • Digital Image Analysis

Background:

  • Lip prints exhibit unique patterns, similar to fingerprints, offering potential for identification.
  • Standardized methods for analyzing lip print uniqueness are needed for reliable forensic applications.

Purpose of the Study:

  • To evaluate the uniqueness of lip prints.
  • To define a standard digital method for analyzing lip print patterns.

Main Methods:

  • Collected lip prints from 100 students using Scotch tape.
  • Performed digital analysis using Adobe Photoshop 7.
  • Applied Suzuki and Tsuchihashi's classification with a weighted value scoring system.

Main Results:

  • No two lip prints showed identical scores across all four quadrants.
  • Lip print patterns remained consistent in the same individuals after 12 months.
  • Digital analysis enabled tracing of up to 15 lines in various quadrants (66-71% in I & II, 51-52% in III & IV).

Conclusions:

  • Lip prints are definitively unique to individuals.
  • Digital analysis enhances visualization and simplifies recording of lip print patterns.
  • The Weighted Value Scoring system provides a standard for assessing lip print uniqueness.