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A Matching and Recognition Method of Indoor Corner Landmarks Based on Crowdsourcing Trajectories

A matching method and technology of inner turning angle, which can be used in the recognition of patterns in signals, services based on location information, services based on specific environments, etc., and can solve problems such as poor recognition performance.

Active Publication Date: 2020-06-30
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides a method for matching and identifying indoor corner landmarks based on crowdsourcing trajectories. The problem of poor recognition performance caused by pedestrian multi-pose and false corner problems

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  • A Matching and Recognition Method of Indoor Corner Landmarks Based on Crowdsourcing Trajectories
  • A Matching and Recognition Method of Indoor Corner Landmarks Based on Crowdsourcing Trajectories
  • A Matching and Recognition Method of Indoor Corner Landmarks Based on Crowdsourcing Trajectories

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Embodiment Construction

[0071] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0072] The method for matching and identifying indoor corner landmarks based on crowdsourcing trajectories provided by the present invention includes landmark recognition and landmark matching; landmark recognition refers to extracting trajectory windows that may belong to certain types of landmarks from crowdsourcing trajectories and forming window fingerprints; The idea is to extract the corre...

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Abstract

The invention discloses a method for matching and identifying indoor corner landmarks based on crowdsourcing trajectories. source signal; collect marked and unlabeled trajectories, and divide them into trajectory windows; extract targeted features from the marked trajectory windows, and train attitude group recognition classifiers and corner recognition classifiers; The marked trajectory window is used to identify the corner landmarks, and the RSS data of the positive class window is extracted; the multi-dimensional scale analysis algorithm is used to reduce the dimension to multiple dimensions, and clustering and matching are performed respectively; Class matching results, so that valid sampling values ​​correspond to a certain corner, and invalid sampling values ​​are filtered; corner landmark fingerprints are generated according to the matching results; compared with existing corner landmark recognition methods, the invention improves the recognition performance.

Description

technical field [0001] The invention belongs to the technical field of communication and wireless network, and more specifically, relates to a method for matching and identifying indoor corner landmarks based on crowdsourcing trajectories. Background technique [0002] With the development of mobile networks, the demand for location-based information services continues to grow; the Global Positioning System (GPS) can provide reliable positioning services in outdoor environments, but the line-of-sight propagation of satellite signals in complex indoor environments leads to poor performance . The existing indoor positioning technology RSS positioning technology includes ranging-based positioning and fingerprint-based positioning; the former uses RSS to calculate the distance from the target to the signal source according to the propagation model to achieve positioning, and this method has poor performance in complex indoor environments; the latter Use the RSS vectors measured...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00H04W4/021H04W4/029H04W4/33G06K9/62H04W64/00
CPCH04W64/00G06F2218/02G06F2218/08G06F2218/12G06F18/23
Inventor 王邦孙宇辰王忠思刘文予
Owner HUAZHONG UNIV OF SCI & TECH
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