HIGH SPEED STEREOSCOPIC PAVEMENT SURFACE SCANNING SYSTEM AND METHOD
First Claim
1. A mobile pavement surface scanning system, comprising:
- one or more light sources for illuminating a pavement surface at a selected wavelength;
one or more stereoscopic image capturing devices for capturing sequential images of the illuminated pavement surface, the sequential images comprising intensity image pairs;
a plurality of positioning sensors adapted to encode movement of the system and provide a synchronization signal for the intensity image pairs captured by the one or more stereoscopic image capture devices; and
one or more computer processors adapted to;
synchronize the intensity image pairs captured by each camera in the one or more stereoscopic image capturing devices;
normalize the contrast of the intensity image pairs;
rectify the intensity image pairs;
calculate 3D elevation data for each point on the pavement surface using stereoscopic principles; and
combine the contrast normalized intensity image pairs with the calculated 3D elevation data to create a stereoscopic 3D image for assessing the quality of the pavement surface using the 3D elevation data to determine the level of deterioration.
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Abstract
There is disclosed a mobile pavement surface scanning system and method, In an embodiment, the system comprises one or more stereoscopic image capturing devices synchronised with one or more light sources mounted on the platform for illuminating a pavement surface, mounted on a mobile survey platform that provides a trigger mechanism to capture sequential image pairs of the illuminated pavement surface and a movement sensor that continuously measures the movement of the platform and a synchronization signal for time or distance synchronized image capture with accurate GPS positioning. One or more computers process the synchronized images captured stamps the images with one or more of time and distance data, GPS location and calculated 3D elevation for each point on the pavement surface using stereoscopic principles, and assesses the quality of the pavement surface to determine the level of pavement surface deterioration.
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Citations
20 Claims
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1. A mobile pavement surface scanning system, comprising:
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one or more light sources for illuminating a pavement surface at a selected wavelength; one or more stereoscopic image capturing devices for capturing sequential images of the illuminated pavement surface, the sequential images comprising intensity image pairs; a plurality of positioning sensors adapted to encode movement of the system and provide a synchronization signal for the intensity image pairs captured by the one or more stereoscopic image capture devices; and one or more computer processors adapted to; synchronize the intensity image pairs captured by each camera in the one or more stereoscopic image capturing devices; normalize the contrast of the intensity image pairs; rectify the intensity image pairs; calculate 3D elevation data for each point on the pavement surface using stereoscopic principles; and combine the contrast normalized intensity image pairs with the calculated 3D elevation data to create a stereoscopic 3D image for assessing the quality of the pavement surface using the 3D elevation data to determine the level of deterioration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A mobile pavement surface scanning method, comprising:
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illuminating a pavement surface at a selected wavelength utilizing one or more light sources; capturing sequential images of the illuminated pavement surface utilizing one or more stereoscopic image capturing devices, the sequential images comprising intensity image pairs; utilizing a plurality of positioning sensors, encoding movement and providing a synchronization signal for the intensity image pairs captured by the one or more stereoscopic image capture devices; and utilizing one or more computer processors to; synchronize the intensity image pairs captured by each camera in the one or more stereoscopic image capturing devices; normalize the contrast of the intensity image pairs; rectify the intensity image pairs; calculate 3D elevation data for each point on the pavement surface using stereoscopic principles; and combine the contrast normalized intensity image pairs with the calculated 3D elevation data to create a stereoscopic 3D image for assessing the quality of the pavement surface using the 3D elevation data to determine the level of deterioration. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification