Road feature extracting method based on fracture surface subdivision
A feature extraction and segmentation technology, applied in the re-radiation of electromagnetic waves, the use of re-radiation, measurement devices, etc., can solve the problems of safety hazards for driving and measurement personnel, unguaranteed position measurement accuracy, and high subjective arbitrariness of personnel. The effect of eliminating personal safety hazards, application value of major projects, and shortening the data acquisition cycle
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[0025] A road feature extraction method based on section division, such as figure 1 As shown, it is suitable for the extraction of features such as road surfaces and protective facilities. Each step is described in detail as follows:
[0026] The first step, the acquisition of laser scanning data
[0027] Using vehicle-mounted laser radar measurement equipment, the vehicle travels on the road at a speed of 40-60 km / h, and conducts high-density field scanning on both sides of the road to obtain field data; when calculating in the office, it is observed synchronously Based on the GPS reference station data, the observation data obtained by the vehicle GPS and the IMU data are used for comprehensive processing, and the vehicle trajectory is obtained through calculation, and then the accurate original laser scanning point cloud data is obtained. The average point spacing of the laser point cloud is less than 5cm , and finally complete the data collection in the field and the pre...
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