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Quantitative Visualization and Detection of Skin Cancer Using Dynamic Thermal Imaging
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Relatively Permanent Pigmented or Vascular Skin Marks for Identification: A Pilot Reliability Study.

Arfika Nurhudatiana1,2, Adams Wai-Kin Kong1, Noah Craft3

  • 1School of Computer Engineering, Nanyang Technological University, Block N4, Nanyang Avenue, Singapore City, 639798, Singapore.

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|August 4, 2015
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Summary

Relatively permanent pigmented or vascular skin marks (RPPSVM) show promise as a biometric trait for identifying individuals from skin images in exploitation cases. A pilot study found dermatology physicians achieved 0% misidentification, suggesting their potential as examiners.

Keywords:
biometricsbody geometrydigital evidenceforensic scienceidentificationinterexaminer variabilityskin mark

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Area of Science:

  • Forensic Science
  • Dermatology
  • Biometrics

Background:

  • Child sexual exploitation cases often yield images of non-facial body parts.
  • Identification relies on unique, permanent skin features.
  • Relatively permanent pigmented or vascular skin marks (RPPSVM) offer a novel biometric trait.

Purpose of the Study:

  • To evaluate the interexaminer variability in identifying RPPSVM.
  • To assess the feasibility of using dermatology physicians as RPPSVM examiners.

Main Methods:

  • Four dermatology physicians examined 75 skin images (50 reference, 25 evaluation) from 51 subjects.
  • Examiners identified and matched RPPSVM between reference and evaluation images.

Main Results:

  • A 0% misidentification rate was observed.
  • Examiners failed to find a match in 6% of cases on average.
  • High potential for dermatology physicians in RPPSVM examination.

Conclusions:

  • RPPSVM identification by dermatology physicians is highly accurate.
  • This method shows promise for forensic identification in sensitive cases.
  • Further research can validate RPPSVM as a reliable biometric trait.