Indoor Positioning via AR Virtual Markers and Magnetometer Correction
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Solution Overview
Problem
Conventional indoor positioning services face challenges in popularization due to the need for pre-installed infrastructure like Bluetooth beacons and precise coordinate specification, especially for high-accuracy applications.
Innovation Solution
An electronic device with a camera and processor generates a virtual marker using augmented reality, allowing for precise indoor positioning without additional infrastructure by displaying a point moving in AR, recognizing selected spots, and correcting magnetometer values using reference directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional indoor positioning services use Bluetooth beacons or pre-installed infrastructure, then positioning accuracy is improved, but device complexity and installation cost increase
Solution Approach 1:
The patent extracts the positioning function from dedicated infrastructure (Bluetooth beacons) and transfers it to the camera system. The camera captures images that contain positioning information, eliminating the need for separate beacon devices and reducing overall system complexity while maintaining positioning accuracy.
Solution Approach 2:
The camera is given multiple functions: it serves both as a general imaging device and as a positioning sensor. By processing images captured by the same camera used for normal photography, the system achieves positioning capabilities without adding dedicated positioning hardware, thus reducing device complexity.
2Measurement precision
If Bluetooth beacons are installed for high-precision positioning, then positioning accuracy is improved, but ease of operation deteriorates due to installation requirements
Solution Approach 1:
The system uses the camera's own imaging capability to perform positioning without requiring external services or infrastructure. The camera captures images that inherently contain spatial information, and the processing algorithm extracts positioning data autonomously, making the system self-sufficient and easy to deploy.
Solution Approach 2:
The patent performs preliminary processing of camera images to extract positioning information before actual positioning is needed. By pre-processing images to identify features and calculate positions, the system prepares positioning data in advance, enabling quick and easy deployment without time-consuming infrastructure installation.
3Ease of operation
If geofencing is used for indoor positioning, then ease of operation is improved, but positioning accuracy deteriorates
Solution Approach 1:
The patent segments the indoor space into multiple distinguishable regions based on image features captured by the camera. Each region is identified through unique visual characteristics, allowing the system to provide both simple region-based positioning (like geofencing) and precise location identification within each region, thus maintaining both ease of operation and accuracy.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables high-precision entry/exit detection from specific indoor spots with centimeter-level accuracy without additional infrastructure, facilitating efficient indoor positioning services.
Implementation Method 1
storing sensor information including a magnetometer value measured while the point is moving within the guide area
Data Source
AI summary
An electronic device is provided. The electronic device includes a display, a camera, and a processor operatively connected to the display and the camera. The processor may display an augmented reality on the display on the basis of an image captured by the camera, may display a point on the display so as to move on the augmented reality while interworking with the movement of the electronic device, may recognize a selected spot on the augmented reality, may display a guide area on the augmented reality, the guide area including the selected spot such that the point moves within a specific area, may store sensor information including a geomagnetic value measured while the point moves within the guide area, may store radio signal intensity information measured while the point moves within the guide area, and may correct a geomagnetic value included in the sensor information.