The3D Modeling Of Pavement Based On Photogrammetry Method

China's social and economic develops quickly, it promotes the developmentof infrastructure in our country, such as road construction, at the same time it also promotes the vigorous development of the road detection technology. In the process of pavement maintenance management, data acquisition system is very perfect and mature, but how to apply these data to the3d road in the reconstruction efficiently and intuitively, has always been a lag research direction. The traditional data acquisition channels of3d road model is very narrow, it mostly comesfrom the road design documents, image extraction or the discrete data by usingthe global positioning system (GPS) measurement and so on.3d road model byusing these data can only reflect the macro information such as road's surrounding terrain environment, query and positioning ancillary facilities, it can hardly provide roughness, rut, etc. related to the safety of road rolling microscopic information, so it is difficult to meet the needs of road maintenance and quality evaluation.So, in order to describe the ups and downs of road comprehensively and accurately, combined with my undergraduate major, I hope to find a new road building method of3d model by using photogrammetry and road discipline. The method can improve the accuracy of the3d road model, reduce the labor and cost.1. The article study basic knowledge and theory of photogrammetry method,then study the basic knowledge and theory of photogrammetry method in detail,deduce the direct linear transformation method of Photogrammetry by collinearequation, verifies the feasibility of this method for3d pavement.2. The article also introduces the camera binocular vision theory?leads to the distortion parameters of the camera?provides camera calibration method and the camera's internal parameters3. The research do indoor pavement model test and outdoor real3d road model test by photogrammetry way, obtains the theory and actual errors of test, compares the theoretical error and the actual error by test, determines the accuracyand stability of the model by this method, analysis the reason of error and generating the visualization digital3d model of pavement.