Study of Roadway Visibility as a Function of Lighting Direction

• Abstract:

  This study investigates how the geometry of illumination affects the visibility of a target as seen by a camera in a foggy environment. The visibility is expressed in MOR (Meteorological Optical Range). An experimental setup was developed using a transparent Fog Chamber (FC) that allows fog generation, enabling visibility variation along the optical path without the need for large-scale fog environments. A moving light source provides the lighting. We compare the MOR calculated with the camera-captured image contrast with a reference MOR estimated with an illumination-independent system. The results show the MOR perceived by the camera varies with the lighting angle for angles higher than 15°.
• Download:

  IMEKO-TC2-2025-019.pdf
• DOI:

  tc2-2025.019

Event details:

• IMEKO TC:

  TC2
• Event name:

  IMEKO TC2 PhotoMet 2025
• Title:

  2025 IMEKO TC2 International Symposium on Modern Photonic Metrology

  PhotoMet 2025 - Shaping the Future of Photonic Metrology

• Place:

  Modena, ITALY
• Time:

  1 September 2025 - 3 September 2025