Dr. Simon D. McLoughlin Profile

Dr. Simon D. McLoughlin

at Technological Univ Dublin

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Proceedings Article | 1 June 2005 Paper

Classification of road sign type using mobile stereo vision

Simon McLoughlin, Catherine Deegan, Conor Fitzgerald, Charles Markham

Proceedings Volume 5823, (2005) https://doi.org/10.1117/12.604824

KEYWORDS: Reflectors, Roads, Headlamps, Light, Reflectivity, Retroreflectors, Sensors, Cameras, Data acquisition, Reflection

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This paper presents a portable mobile stereo vision system designed for the assessment of road signage and delineation (lines and reflective pavement markers or "cat's eyes"). This novel system allows both geometric and photometric measurements to be made on objects in a scene. Global Positioning System technology provides important location data for any measurements made. Using the system it has been shown that road signs can be classfied by nature of their reflectivity. This is achieved by examining the changes in the reflected light intensity with changes in range (facilitated by stereo vision). Signs assessed include those made from retro-reflective materials, those made from diffuse reflective materials and those made from diffuse reflective matrials with local illumination. Field-testing results demonstrate the systems ability to classify objects in the scene based on their reflective properties. The paper includes a discussion of a physical model that supports the experimental data.

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