Estimating the skull-to-camera distance from facial photographs for craniofacial superimposition

Stephan, Carl N. (2017) Estimating the skull-to-camera distance from facial photographs for craniofacial superimposition. Journal of Forensic Sciences, 62 4: 850-860. doi:10.1111/1556-4029.13353


Author Stephan, Carl N.
Title Estimating the skull-to-camera distance from facial photographs for craniofacial superimposition
Journal name Journal of Forensic Sciences   Check publisher's open access policy
ISSN 1556-4029
0022-1198
Publication date 2017-01-18
Sub-type Article (original research)
DOI 10.1111/1556-4029.13353
Open Access Status Not yet assessed
Volume 62
Issue 4
Start page 850
End page 860
Total pages 11
Place of publication Hoboken, NJ, United States
Publisher Wiley-Blackwell Publishing
Language eng
Subject 2734 Pathology and Forensic Medicine
1311 Genetics
Abstract The overlay of a skull and a face image for identification purposes requires similar subject-to-camera distances (SCD) to be used at both photographic sessions so that differences in perspective do not compromise the anatomical comparisons. As the facial photograph is the reference standard, it is crucial to determine its SCD first and apply this value to photography of the skull. So far, such a method for estimating the SCD has been elusive (some say impossible), compromising the technical validity of the superimposition procedure. This paper tests the feasibility of using the palpebral fissure length and a well-established photographic algorithm to accurately estimate the SCD from the facial photograph. Recordings at known SCD across a 1-10 m range (repeated under two test conditions) demonstrate that the newly formulated method works: a mean SCD estimation error of 7% that translates into <1% perspective distortion error between estimated and actual conditions.
Keyword Craniofacial identification
Forensic science
Perspective distortion
Photography
Subject-to-camera distance
Video superimposition
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
School of Biomedical Sciences Publications
Admin Only - School of Biomedical Sciences
 
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