Abstract
AbstractAs focus distance (FD) sets perspective, it is an important consideration for the forensic analysis of faces in photographs, including those used for craniofacial superimposition. In the craniofacial superimposition domain, the PerspectiveX algorithm has been suggested for FD estimation. This algorithm uses a mean value of palpebral fissure length, as a scale, to estimate the FD. So far, PerspectiveX has not been validated for profile view photographs or for photographs taken with smartphones. This study tests PerspectiveX in both front and profile views, using multiple DSLR cameras, lenses and smartphones. In total, 1709 frontal and 1709 profile photographs of 10 adult participants were tested at 15 ground truth FDs using three DSLR cameras with 12 camera/lens combinations, five smartphone back cameras and four smartphone front cameras. Across all distances, PerspectiveX performed with a mean absolute error (MAE) of 11% and 12% for DSLR photographs in frontal and profile views, respectively, while errors doubled for frontal and profile photographs from smartphones (26% and 27%, respectively). This reverifies FD estimation for frontal DSLR photographs, validates FD estimates from profile view DSLR photographs and shows that FD estimation is currently inaccurate for smartphones. Until such time that FD estimations for facial photographs taken using smartphones improves, DSLR or 35 mm film images should continue to be sought for craniofacial superimpositions.
Funder
The University of Queensland
Publisher
Springer Science and Business Media LLC
Subject
Pathology and Forensic Medicine
Reference64 articles.
1. Rai B, Kaur J (2012) Craniofacial identification. Evidence-based forensic dentistry. Springer, Berlin Heidelberg Berlin, Heidelberg, pp 65–71
2. Roosenboom J, Hens G, Mattern BC, Shriver MD, Claes P (2016) Exploring the underlying genetics of craniofacial morphology through various sources of knowledge. Biomed Res Int 2016:3054578. https://doi.org/10.1155/2016/3054578
3. Mann M, Smith MC (2017) Automated facial recognition technology: recent developments and approaches to oversight. Univ New South Wales Law J 40:121–145
4. Glaister J, Brash JC (1937) Medico-legal aspects of the Ruxton case. William Wood and Co., Baltimore
5. Brown KA (1993) The Truro murders in retrospect: a historical review of the identification of the victims. Ann Acad Med, Singapore 22:103–106
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