Asphalt Pavement Texture Real-time Identification System Based on Oblique Photography

In order to solve the problem of asphalt pavement being limited by environmental conditions in traditional measurement methods and the loss of texture information data in the measurement results, and to achieve scientific and reasonable evaluation of real-time anti-sliding performance of asphalt pavement during the service period, based on oblique photography technology and positioning technology, the analysis module and digital processing real-time recognition system created by the 3D reconstruction software CC（Context Capture） and Matlab were proposed. The average construction depth of texture parameters of the pavement-MTD, the ratio of the raised structure volume of asphalt pavement to the total structural volume-concave convex ratio were obtained. It was compared with the traditional measurement methods such as the structural depth measured by the sand-laying method and the pendulum value measured by the pendulum instrument. The results showed that the correlation R~2 between MTD obtained by oblique photography technology and the sand-laying method was 0.997 7, and the anti-sliding performance of the pavement reflected by the construction depth combined with the concave convex ratio had accuracy and effectiveness, so the accuracy recognition of the texture structure information on the pavement was close to 0.01 mm, which can be used as a new means for pavement sliding resistance detection, providing accurate and real-time anti-sliding data reference for road evaluation, management monitoring and maintenance.