PROCEDURE AND DEVICE FOR THE MEASUREMENT OF DYNAMIC LUMINANCE AND RETROREFLECTION OF ROAD MARKINGS AND SIGNALS AND THE OBTENTION OF THE SHAPE, POSITION AND DIMENSIONS OF THE SAME

摘要

A dynamic measurement procedure of the luminance and retroreflection of the road markings and signals and obtention of the dimensions of the same from a vehicle that circulates on the road; illuminating the zone of interest; knowing the position of the vehicle; measuring the luminance by means of a light sensor in a single pass, at known distances or intervals; identifying and extracting one or several road markings and signals simultaneously in each measurement of luminance by means of algorithms; referencing the luminance both geometrically and in time, as well as the obtention of the shape, position and dimensions of the same; and the device for carrying out said procedure, which includes a luminous source, a system of global positioning of the vehicle, a light sensor, a camera, a data processor and a data storage device.

主权项

1. Dynamic procedure of measurement of the luminance and retroreflection of the road markings and signals and obtention of the dimensions of the same from a vehicle that circulates along the road, comprising the following steps:
a. illumination of zone of interest with illuminating source, b. positioning of vehicle by means of global positioning system, c. measurement of the luminance by means of light sensor of the zone of interest in a single pass, at distances or intervals known in the same moment as step b), d. simultaneous identification and extraction of one or more road markings and signals during each measurement of the illumination acquired in step c) and, in relation to the zone of interest, by means of artificial or manual vision algorithms, e. referencing of the illumination obtained in step c) according the the measurement of step b), both geometrically and in time, f. measurement over road markings and signals identified in step d), and referred to in step e), of the luminance values and the of retroreflection coefficient. g. obtention of the shape, position and dimensions of said road markings and signals identified in step d) and referred to in step e).