Mobile terminal-based indoor positioning method and system for WIFI and visual information

A mobile terminal and visual information technology, applied in the field of positioning and navigation, can solve the problems of high equipment cost and low indoor positioning accuracy, and achieve the effect of good positioning effect, less interference, and improved accuracy.

Active Publication Date: 2017-05-31
WUHAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide an indoor positioning method and system based on WIFI

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  • Mobile terminal-based indoor positioning method and system for WIFI and visual information
  • Mobile terminal-based indoor positioning method and system for WIFI and visual information
  • Mobile terminal-based indoor positioning method and system for WIFI and visual information

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Embodiment Construction

[0039] 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.

[0040] The indoor positioning method based on WIFI of mobile terminal and visual information of the embodiment of the present invention, comprises the following steps:

[0041] S1. Through the position of the terminal device near each fire safety exit sign indoors, collect WIFI signals, and take images of the fire safety exit signs; the terminal devices include mobile phones, tablet computers, etc. And measure the coordinates of the exit sign in the flat map.

[0042] S2. Analyze the WIFI signal and image information, obtain the WIFI signal address and its signal strength near each exit sign, and ...

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Abstract

The invention discloses a mobile terminal-based indoor positioning method and system for WIFI and visual information. The method comprises the following steps of (S1) collecting a WIFI signal at the position near each interior fire safety exit sign, simultaneously shooting an image of each fire safety exit sign and measuring a coordinate of each exit sign in a plane map; (S2) analyzing WIFI information and image information, obtaining an WIFI signal address and signal strength of each exit sign, calculating an SURF feature descriptor of the corresponding image and a homography between a three-dimensional coordinate system and a world coordinate system, and storing a signal strength list, the SURF feature descriptor and the homography of each position into a map database; and (S3) finding out the position with the highest matching degree from the map database according to the signal strength list and the SURF feature descriptor of the current position and determining a specific position of a user by combining the homography of a map image of the corresponding position and a positioning error experience value. A signal base station does not need to be added and the indoor positioning accuracy is high.

Description

technical field [0001] The invention relates to the field of positioning and navigation, in particular to an indoor positioning method and system based on WIFI and visual information of a mobile terminal. Background technique [0002] With the rapid increase of data services, people's demand for positioning and navigation is increasing, especially in complex indoor environments, such as airport halls, exhibition halls, warehouses, supermarkets, libraries, underground parking lots, etc. The indoor location information of the terminal or its holder, facilities and objects. [0003] At present, there are many indoor positioning technology solutions, such as A-GPS positioning technology, ultrasonic positioning technology, Bluetooth technology, infrared technology, radio frequency identification technology, ultra-wideband technology, wireless local area network, light tracking positioning technology, and image analysis, beacon Positioning, computer vision positioning technology,...

Claims

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Application Information

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IPC IPC(8): G01C21/20
CPCG01C21/206
Inventor 胡钊政黄刚胡月志杨哲
Owner WUHAN UNIV OF TECH
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