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A positioning and navigation method based on spatial information model and real-time image comparison

A technology of spatial information, positioning and navigation, applied in the field of positioning and navigation, can solve the problems of wrong navigation direction, noise interference, signal deviation, etc., and achieve the effects of low construction cost, three-dimensional navigation, and high positioning accuracy

Active Publication Date: 2021-09-07
POWERCHINA HUADONG ENG COPORATION LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

Outdoor positioning and navigation maps, such as AutoNavi and Baidu, etc. With the accumulation of user groups and closely following the development and changes of cities, the map content is constantly updated, but the precise positioning is subject to the characteristics of navigation and positioning technology, which is prone to signal deviation and noise interference , the navigation direction is wrong, etc.
Indoor positioning and navigation is currently mainly used in hospitals, comprehensive shopping malls, large venues, etc. Indoor maps are built separately and resources are not shared with each other. There is currently no public version of indoor map services

Method used

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  • A positioning and navigation method based on spatial information model and real-time image comparison
  • A positioning and navigation method based on spatial information model and real-time image comparison
  • A positioning and navigation method based on spatial information model and real-time image comparison

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specific Embodiment

[0032] To optimize the above scheme, in step S1, theoretically, the spatial information model can be subdivided infinitely. In practice, it will be within the range of possible positions and viewing angles of moving objects according to the significance of spatial features, the constraints of positioning and navigation, and the accuracy requirements. perform finite-precision meshing (e.g. figure 2 shown), reduce the number of records in the location information table, and speed up the extraction of effective information.

[0033] To optimize the above scheme, in step S1, the spatial information model is a three-dimensional visualization model produced synchronously in the computer when the project is renovated or newly built, covering the indoor model and the outdoor model, and is the digital handover information of the project completed by the construction party. The model image features are extracted from the long-term stable features of the terrain, civil structures, mecha...

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Abstract

The invention provides a positioning and navigation method based on the comparison between the spatial information model and the real-time image, which divides the spatial information model into full-space and omni-directional grids, and extracts the model image features of all nodes and viewing angles, and records them in Position information table; then obtain the real scene image under the current position and viewing angle of the moving object, and perform feature extraction of the real scene image, match and retrieve the extracted image features with the position information table records, and obtain the current position and viewing angle information of the moving object. The invention utilizes the spatial information model provided by the completion of engineering construction to perform positioning and navigation of complex indoor buildings, has higher positioning accuracy, lower construction cost, and more three-dimensional and intuitive navigation. The invention breaks the current situation that the indoor and outdoor positioning and navigation technologies are isolated from each other, and realizes the integrated application of indoor and outdoor positioning and navigation by unifying the data source and the unified technology.

Description

technical field [0001] The invention relates to the technical field of positioning and navigation, in particular to a positioning and navigation method based on comparison between a spatial information model and a real-time image. Background technique [0002] With the rapid development of satellite navigation technologies such as GPS and Beidou, as well as mobile devices and wireless communication technologies, it has brought great convenience to public travel, and solved the needs of indoor and outdoor positioning and navigation to a certain extent, but indoor and outdoor navigation are isolated from each other. , has not yet formed a positioning and navigation solution for indoor and outdoor integrated applications. Outdoor positioning and navigation maps, such as AutoNavi and Baidu, etc. With the accumulation of user groups and closely following the development and changes of cities, the map content is constantly updated, but the precise positioning is subject to the cha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C21/00
CPCG01C21/005
Inventor 王国光赵杏英徐震陈沉
Owner POWERCHINA HUADONG ENG COPORATION LTD
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