A Pedestrian Road Network Extraction and Update Method Based on Crowdsourcing Trajectories
An update method and pedestrian technology, applied in the field of intelligent transportation, can solve the problem that the road network does not cover the pedestrian path.
Active Publication Date: 2022-06-17
SHENZHEN UNIV
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[0004] The technical problem to be solved by the present invention is to provide a pedestrian road network extraction and update method based on crowdsourcing trajectories, aiming at solving the problem that the current road network does not cover enough pedestrian paths in the prior art. The problem
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[0046] In order to make the objectives, technical solutions and advantages of the present invention clearer and clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.
[0047] see also Figure 1-Figure 6 , the present invention provides some embodiments of a crowdsourced trajectory-based pedestrian road network extraction and update method.
[0048]With the development of mobile positioning technology and smart cities, the GPS receiving devices of urban buses and taxis and user mobile phones can record information such as the position, moving speed and direction of vehicles or pedestrians in real time, which records the GPS trajectories of vehicles and user travel paths Data can reflect road topology information in real time or near real time, a...
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The invention discloses a pedestrian road network extraction and update method based on crowdsourcing trajectory, comprising the steps of: extracting and processing crowdsourced pedestrian GPS trajectory data to obtain a new pedestrian road network; combining the new pedestrian road network with the original Matching is performed on the pedestrian road network to obtain mismatched paths; according to the mismatched paths, the original pedestrian road network is updated to obtain an updated road network. Use the mobile phone to collect crowdsourced pedestrian GPS trajectory data, preprocess the crowdsourced pedestrian GPS trajectory data according to the constraints of distance and time interval, and use Morse theory to extract the road network from the preprocessed trajectory to obtain a new pedestrian road network; The new pedestrian network and the original pedestrian network are matched through the hidden Markov process to obtain the mismatched path, that is, the newly added road; according to the mismatched path, the newly added road is added to the original road network to obtain Updated pedestrian network.
Description
technical field [0001] The invention relates to the technical field of intelligent transportation, in particular to a method for extracting and updating a pedestrian road network based on crowdsourcing trajectory. Background technique [0002] A pedestrian network is a topological map that describes the geometric relationship between pedestrian paths. Pedestrian road networks are a key factor not only in the connectivity and accessibility of urban road networks, but also in pedestrian navigation systems. Pedestrian navigation systems require a pedestrian road network to plan routes and help pedestrians reach their destinations, especially when it comes to road guidance for people with disabilities. Portable navigation services in the prior art cannot fully meet the needs of pedestrian navigation, because the current road network does not cover enough pedestrian paths, which directly leads to the fact that most routes provided by existing pedestrian navigation service applic...
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IPC IPC(8): G01C21/34G01S19/39G01S19/42G08G1/005
CPCG01C21/343G01C21/3446G01S19/393G01S19/42G08G1/005
Inventor 周宝定郑恬静黄金彩李清泉
Owner SHENZHEN UNIV