System and assessment of reflective objects along a roadway

摘要

A system for the assessment of reflective surfaces disposed along a roadway repeatedly illuminates an area along the roadway that includes at least one reflective surface using a light source. Multiple light intensity values are measured over a field of view which includes at least a portion of the area illuminated by the light source. A computer processing system is used to identifying a portion of the light intensity values associated with a reflective surface and analyze the portion of the light intensity values to determine assessment for that reflective surface.

主权项

1. An automated method for classifying a reflective road marker having at least one color comprising:
using a light source to illuminate at least a portion of the reflective road marker as the light source is traversed along a roadway; collecting a plurality of light intensity measurements reflected from the at least a portion of the reflective road marker, the light intensity measurements corresponding to exemplary angular displacements of incident light from a reference position; providing a database of retroreflectivity profiles, each retroreflectivity profile having an associated known road marker type having a known color; and using a computer processing system configured to:
generate an as-measured retroreflectivity profile based on the plurality of light intensity measurements;select at least one retroreflectivity profile from the database of retroreflectivity profiles that correlates to at least a portion of the as-measured retroreflectivity profile;determine a road marker type from a set of road markers that is associated with the selected at least one retroreflectivity profile; and classify the road marker according to the color associated with the determined road marker type.