Comparative Assessment of a Novel Photo-Anthropometric Landmark-Positioning Approach for the Analysis of Facial Structures on Two-Dimensional Images

• Flores, Marta R. P. ^[1] ; Machado, Carlos E. P. ^[2] ; Gallidabino, Matteo D. ^[3] ; de Arruda, Gustavo H. M. ^[4] ; da Silva, Ricardo H. A. ^[5] ; de Vidal, Flávio B. ^[6] ; Melani, Rodolfo F. H. ^[1]
  1. [1] Universidade de São Paulo

     Universidade de São Paulo

     Brasil

     
  2. [2] Brazilian Federal Police, National Institute of Criminalistics, INC Building.Brasil
  3. [3] Centre for Forensic Science, Department of Applied Sciences, Faculty of Health and Life Sciences, Northumbria University.Reino Unico
  4. [4] Brazilian Federal Police, Technical and Scientific Sector.Brasil
  5. [5] Department of Stomatology, Public Health and Forensic Odontology, Dentistry College of Ribeirao Preto, University of Sao Paulo,Brasil
  6. [6] Department of Computer Science, University of Brasilia.Brasil

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• Localización: Journal of forensic sciences, ISSN-e 1556-4029, ISSN 0022-1198, Vol. 64, Nº. 3, 2019, págs. 828-838
• Idioma: inglés
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• Resumen

  • Positioning landmarks in facial photo-anthropometry (FPA) applications remains today a highly variable procedure, as traditional cephalometric definitions are used as guidelines. Herein, a novel landmark-positioning approach, specifically adapted for FPA applications, is introduced and, in particular, assessed against the conventional cephalometric definitions for the analysis of 16 landmarks on ten frontal images by two groups of examiners (with and without professional knowledge of anatomy). Results showed that positioning reproducibility was significantly better using the novel method. Indeed, in contrast to the classic approach, very low landmark dispersions were observed for both groups of examiners, which were usually below the strictest clinical standards (i.e., 0.575 mm). Furthermore, the comparison between the two groups of examiners highlighted higher dispersion consistencies, which supported a higher robustness. Thus, the use of an adapted landmark-positioning approach proved to be highly advantageous in FPA analysis and future work in this field should consider adopting similar methodologies.