Minimum requirements for taxicab security cameras

Details

• Personal Author:
  Amandus HE ; Amendola, Alfred A. ; Cantis DM ; Newbraugh BH ; Weaver D ; Zeng S
• Description:
  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. [Description provided by NIOSH]
• Subjects:
  Accidents, Occupational Mining Occupational Health Safety
• Keywords:
  Author Keywords: Taxicab Homicide Dynamic Range Facial Identification Humans Lens Distortion Men Morbidity-rates Mortality-rates Motion Blur Motor-vehicles Photographic-equipment Photographic Resolution Photography Safety-equipment Safety-measures Safety-practices Women

  More +
• ISSN:
  2160-0473
• Document Type:
  Text
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 3 ; West Virginia
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  DSR - Division of Safety Research
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  216-255
• Volume:
  4
• Issue:
  3
• NIOSHTIC Number:
  nn:20044829
• Citation:
  J Transp Technol 2014 Jul; 4(3):216-255
• Contact Point Address:
  Shengke Zeng, Division of Safety Research, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Morgantown, WV
• Email:
  szeng@cdc.gov
• Federal Fiscal Year:
  2014
• NORA Priority Area:
  Healthcare and Social Assistance ; Transportation, Warehousing and Utilities
• Peer Reviewed:
  True
• Source Full Name:
  Journal of Transportation Technologies
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:c26fe910952a02d22334d8a60c07a278ec4b6f65ed9e0141b7f073eae01b440b33c1fff5ea12dd78d6cab74c8ffd7cd85cb13f785c84327b2162d8bc039fe15f
• Download URL:
  https://stacks.cdc.gov/view/cdc/200449/cdc_200449_DS1.pdf
• File Type:
  [PDF - 5.95 MB ]