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Map matching method, device, equipment and medium

A map matching and map technology, applied in the field of intelligent transportation, can solve the problem of low matching accuracy and achieve the effect of improving the accuracy

Active Publication Date: 2021-03-12
BEIJING BAIDU NETCOM SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the above method has a low matching accuracy for the scene where the user makes an illegal U-turn and the scene where the user makes an early turn at the intersection.

Method used

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  • Map matching method, device, equipment and medium
  • Map matching method, device, equipment and medium
  • Map matching method, device, equipment and medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] figure 2 It is a flowchart of a map matching method provided in Embodiment 1 of the present invention. This embodiment is applicable to the situation where map matching is performed on vehicle trajectories. Typically, this embodiment is applicable to the situation where map matching is performed on vehicle trajectories where the user makes an illegal U-turn and / or the user makes an early turn at an intersection. The method can be executed by a map matching device, and the device can be realized by software and / or hardware. see figure 2 , a map matching method provided in this embodiment, comprising:

[0045] S110. Perform reverse point detection on the vehicle trajectory according to the point velocity direction of the vehicle trajectory point and the traveling direction of the road section to which the vehicle trajectory point belongs.

[0046] Wherein, the vehicle track point is a positioning coordinate point for the vehicle.

[0047] The vehicle trajectory is ...

Embodiment 2

[0084] image 3 It is a flow chart of a map matching method provided in Embodiment 2 of the present invention. This embodiment is an optional solution provided on the basis of the foregoing embodiments. see image 3 , the map matching method provided in this embodiment includes:

[0085] S210. Perform reverse point detection on the vehicle trajectory according to the point velocity direction of the vehicle trajectory point and the traveling direction of the road section to which the vehicle trajectory point belongs.

[0086] S220. If the model of the vehicle belongs to the target model other than two passengers and one danger, and the driving scene belongs to the target driving scene except high-speed driving and tunnel driving scenes, determine that the vehicle has a demand map re-matching requirement for abnormal driving recognition .

[0087] Wherein, the set number threshold is the maximum value of the number of consecutive reverse points caused by the detection error ...

Embodiment 3

[0098] Figure 4a It is a flowchart of a map matching method provided by Embodiment 3 of the present invention. This embodiment is an optional solution proposed on the basis of the foregoing embodiments. see Figure 4a , the map matching method provided in this embodiment includes:

[0099] First, trajectory preprocessing is required for vehicle trajectories. Among them, trajectory preprocessing is mainly divided into two parts, one is trajectory source filtering, and the other is tunnel discrimination.

[0100] This is because this embodiment re-matches the map for the vehicle trajectory in the scene where the user makes an abnormal U-turn and the scene where the user makes an early turn at an intersection. Therefore, not all vehicles and all driving scenarios have map re-matching requirements.

[0101] For example, if the vehicle type is a vehicle with two passengers and one dangerous vehicle, and / or the driving scene is: the driving scene on the highway and the driving...

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Abstract

The embodiments of the invention disclose a map matching method and device, equipment and a medium and relate to the intelligent traffic technology field. The method comprises the following steps of carrying out a reverse point detection on a vehicle track according to a point speed direction of a vehicle track point and a driving direction of a road section which the vehicle track point belongs to; if a number of continuous reverse points is detected to be greater than a set number threshold in a vehicle track, carrying out map rematching on the continuous reverse points; and using a map rematching result to correct a map matching result of the vehicle track. By using the map matching method and device, the equipment and the medium, road segment matching accuracy of a scene where a user makes an illegal u-turn and the scene where the user turns the corner ahead is improved.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of intelligent transportation, and in particular to a map matching method, device, equipment and medium. Background technique [0002] Map matching refers to the process of matching the coordinate sequence of the vehicle to the appropriate road section in the road network. In general, the implementation of map matching is: input the vehicle position sequence and the basic road network into the hidden Markov model, and output the road segment sequence matched with the vehicle position sequence. [0003] However, the above method has a low matching accuracy for the scene where the user makes an illegal U-turn and the scene where the user makes an early turn at an intersection. Contents of the invention [0004] Embodiments of the present invention provide a map matching method, device, device, and medium, so as to improve the matching accuracy of road sections in the scene where th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C21/30G01C21/20G01C25/00G01C21/00
CPCG01C21/005G01C21/20G01C21/30G01C25/00
Inventor 杨宁王亦乐
Owner BEIJING BAIDU NETCOM SCI & TECH CO LTD