Evaluation of Sample Taxicab Security Cameras

Details

• Personal Author:
  Amandus HE ; Amendola, Alfred A. ; Cantis DM ; Current RS ; Newbraugh BH ; Weaver D ; Zeng S
• Description:
  Background: Taxicab drivers have high homicide rates compared to all worker occupations. To help taxi fleets select effective taxicab security cameras, this project tested eight sample taxicab security cameras for determining their photographic quality which correlated to the effectiveness of in-taxicab facial identification. Methods: Five photographic quality metric thresholds: 1) resolution, 2) highlight dynamic range, 3) shadow dynamic range, 4) lens distortion, and 5) shutter speed, were employed to evaluate the photographic quality of the sample cameras. Waterproof tests and fire-resistive tests on recording memory cards were conducted to determine the memory card survivability in water and simulated fire. Results: The Full-HD (1920 x 1080 pixels), HD (1280 x 720 pixels) and dual-lens VGA (2 x 640 x 480 pixels with wide-angle and telephoto lenses) cameras performed well in resolution tests in daylight conditions. The resolution of a single-lens VGA (640 x 480 pixels) camera did not meet the resolution minimum requirements. All of the recording memory cards passed the five-meter/72-hour waterproof test. A fire resistant chamber made with one fire insulation material could protect a single memory card at 538 degree Celsius/1000 degree Fahrenheit for a five-minute simulated fire test. Conclusions: Single-lens VGA-resolution (640 x 480 pixels) cameras are not suggested for use as security cameras in taxicabs with two or more rows of seats. The recording memory cards can survive 5-meter/72-hour waterproof tests. The memory card chamber built with an existing heat insulation material can protect an individual memory card during 538 degree Celsius/1000 degree Fahrenheit for a five-minute fire resistance oven-test. [Description provided by NIOSH]
• Subjects:
  Coal Coal Mining Education Ergonomics Mining Musculoskeletal Diseases Musculoskeletal System Occupational Health Personal Protective Equipment Safety Staff Development

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• Keywords:
  Author Keywords: Taxicab Homicide Dynamic Range Facial Identification Humans Lens Distortion Men Morbidity-rates Mortality-rates Motor-vehicles Photographic-equipment Photography Recording Media Protection Resolution Safety-equipment Safety-measures Safety-practices Shutter Speed Taxicab Security Camera Tests Women

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• 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:
  390-422
• Volume:
  7
• Issue:
  4
• NIOSHTIC Number:
  nn:20050961
• Citation:
  J Transp Technol 2017 Oct; 7(4):390-422
• 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:
  2018
• Peer Reviewed:
  True
• Source Full Name:
  Journal of Transportation Technologies
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:11b81867731b379ddfb8a90d15ec80df632380b62a6ecb6fdc93fb889fecfe080399d797b129bb88c7725b2d103a462c794015c126dac629e1dd471d70c743db
• Download URL:
  https://stacks.cdc.gov/view/cdc/211135/cdc_211135_DS1.pdf
• File Type:
  [PDF - 3.45 MB ]