Geometric facial comparisons in speed-check photographs

It is not always possible to make motorists accountable for speeding in cases where they deny being the driver on the speed-check photograph. An anthropological comparison of facial features using a photo-to-photo comparison can be difficult, depending on the quality of the photographs. One difficulty is that the comparison photographs of the presumed driver are taken with a different camera or camera lens and from a different angle than the speed-check photo. To take a comparison photograph with exactly the same camera setup is almost impossible, making only an imprecise comparison of the individual facial features possible. The geometry and position of each facial feature, for example, the distances between the eyes or the positions of the ears, cannot be taken into consideration. The authors applied a new method which enables a geometric comparison using 3D laser scanning, optical surface digitalization, and photogrammetric calculation of the speed-check photo. The influence of the focal length and the distortion of the objective lens are eliminated and the precise position and viewing direction of the speed-check camera are calculated. Good results are delivered even in cases of low-quality images or when the face of the driver is partly hidden. This new method, Geometric Comparison, is evaluated and validated in a study which is described in this article.

• Record URL:
  • http://www.springerlink.com/content/k4u22m5184085062/
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/09379827
• Authors:
  • Buck, Ursula
  • Naether, Silvio
  • Kreutz, Kerstin
  • Thali, Michael
• Publication Date: 2011-11

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; References;
• Pagination: pp 785-790
• Serial:
  • International Journal of Legal Medicine
  • Volume: 125
  • Issue Number: 6
  • Publisher: Springer
  • ISSN: 0937-9827
  • EISSN: 1437-1596
  • Serial URL: http://link.springer.com/journal/414

Subject/Index Terms

• TRT Terms: Anthropometry; Biometrics; Cameras; Digitized photography; Evidence; Face; Geometric elements; Identification systems; Photogrammetry; Photographs; Scanners; Speed control; Speeding; Surveillance; Vehicle occupants
• Candidate Terms: Face recognition
• Uncontrolled Terms: Comparative analysis
• Geographic Terms: Switzerland
• Subject Areas: Highways; Law; Passenger Transportation; Safety and Human Factors; I73: Traffic Control; I83: Accidents and the Human Factor;

Filing Info

• Accession Number: 01359891
• Record Type: Publication
• Files: TRIS
• Created Date: Dec 30 2011 11:13AM