A Vehicle Trajectory Reconstruction Method Based on License Plate Recognition Data
A technology for vehicle trajectory and license plate recognition, which is applied to services based on location information, services based on specific environments, vehicle components, etc. It can solve the problems of candidate paths that do not conform to actual conditions, cannot reflect different perceptions, and search speed is slow. Achieve the effect of reducing the amount of calculation, good performance, and high restoration accuracy
Active Publication Date: 2021-11-02
SOUTHEAST UNIV
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Problems solved by technology
In the existing candidate path set generation technology, most of them use the K-shortest path algorithm, but this method is slow in searching large-scale road networks, and there may be problems that the candidate paths do not conform to the actual situation
At the same time, in the existing route decision-making technology, most of the decision-making indicators are static, which cannot reflect the different perceptions of travelers on the same route. At the same time, the determination of the weight is subjective to a certain extent, and there are many calculation steps.
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[0058] Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.
[0059] Such as figure 1 As shown, the vehicle trajectory reconstruction method based on license plate recognition data includes five stages: data collection and preprocessing, travel chain division, generation of candidate route sets, calculation of decision indicators, and route decision-making, as follows:
[0060] (1) Collect the topological information of the urban road network and the information (license plate recognition data) of individual vehicles on the road network passing through the road checkpoint within a certain period of time, preprocess the original data, and eliminate errors and duplicate data;
[0061] Among them, the license plate recognition data i...
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The invention discloses a vehicle trajectory reconstruction method based on license plate recognition data, which includes the following steps: 1) Collecting urban road network topology information and information of individual vehicles on the road network passing through road checkpoints within a certain period of time, that is, license plate recognition data, Preprocess the original data; 2) Break the travel chain according to the reasonable travel time obtained from the online map, and separate the complete route set and the incomplete route set; 3) Combine the space-time prism theory and the K shortest path algorithm to generate a candidate route set; 4) Formulate the evaluation index for the candidate path and determine the index normalization method; 5) Use the autoencoder to make decisions and realize the restoration of incomplete vehicle trajectories. The method of the invention can complete the recovery of the incomplete vehicle trajectory caused by missing detection in the urban road network with high precision, the algorithm speed is fast, the robustness is good, and it has a good performance in the actual traffic scene.
Description
technical field [0001] The invention relates to a vehicle trajectory reconstruction method based on license plate recognition data, and belongs to the technical field of vehicle trajectory reconstruction in intelligent transportation. Background technique [0002] Motor vehicle travel paths can not only reflect the characteristics of traffic flow from a microscopic perspective, but also provide data support for the analysis of road network traffic demand and spatio-temporal distribution characteristics. Extracting and analyzing the travel paths of all running vehicles in the road network can restore the actual operating state of the road network. However, because the traffic information collection equipment cannot fully cover the road network and vehicles, and the equipment itself will malfunction and cause data packet loss and other problems, part of the obtained vehicle travel trajectories is incomplete. Therefore, reconstruction of these incomplete trajectories is requir...
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IPC IPC(8): G08G1/01G08G1/017H04W4/029H04W4/40
CPCG08G1/0129G08G1/0137G08G1/017H04W4/029H04W4/40
Inventor 季彦婕戚心怡黎文皓刘攀徐铖铖
Owner SOUTHEAST UNIV