Path restoration method and system based on portal homogenization and dedirectionalization

The invention provides a path restoration method and system based on door frame homogenization and dedirectionalization, and the method comprises the steps: firstly obtaining the original track data of the current travel of a certain vehicle, and carrying out the recursive judgment of ETC door frames in the original track data according to the sequence recorded by a time axis; taking all ETC portals in the same direction between adjacent hubs as homogenized portals and grouping the homogenized portals to form a portal cluster to obtain a plurality of track data sets; and then performing path restoration on the extracted key portal frame by adopting the modes of same-direction merging, reverse merging of the trajectory data groups, key portal frame extraction and segmented path fitting to obtain a restored final complete path of the vehicle, thereby effectively reducing the number of the portal frames transmitted into the path restoration system, reducing the calculation times of the path restoration system, a