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Harries, L. and Kozubal, J. (2004) Camera Effective in Reducing Taxicab Crime. Proceedings of the 17th Annual International Conference of the International Association of Transportation Regulators, Charleston, September 2004.

has been cited by the following article:

  • TITLE: Minimum Requirements for Taxicab Security Cameras

    AUTHORS: Shengke Zeng, Harlan E. Amandus, Alfred A. Amendola, Bradley H. Newbraugh, Douglas M. Cantis, Darlene Weaver

    KEYWORDS: Taxicab Homicide, Facial Identification, Photographic Resolution, Dynamic Range, Lens Distortion, Motion Blur

    JOURNAL NAME: Journal of Transportation Technologies, Vol.4 No.3, July 31, 2014

    ABSTRACT: Problem: The homicide rate of taxicab-industry is 20 times greater than that of all workers. A NIOSH study showed that cities with taxicab-security cameras experienced significant reduction in taxicab driver homicides. Methods: Minimum technical requirements and a standard test protocol for taxicab-security cameras for effective taxicab-facial identification were determined. The study took more than 10,000 photographs of human-face charts in a simulated-taxicab with various photographic resolutions, dynamic ranges, lens-distortions, and motion-blurs in various light and cab-seat conditions. Thirteen volunteer photograph-evaluators evaluated these face photographs and voted for the minimum technical requirements for taxicab-security cameras. Results: Five worst-case scenario photographic image quality thresholds were suggested: the resolution of XGA-format, highlight-dynamic-range of 1 EV, twilight-dynamic-range of 3.3 EV, lens-distortion of 30%, and shutter-speed of 1/30 second. Practical Applications: These minimum requirements will help taxicab regulators and fleets to identify effective taxicab-security cameras, and help taxicabsecurity camera manufacturers to improve the camera facial identification capability.