Implementation of QR Code Recognition Technology Using Smartphone Camera for Indoor Positioning

Numerous studies on positioning technology are ongoing for recognizing the positions of objects accurately. Vision-, sensor-, and signal-based technologies are combined for recognizing the positions of objects outdoors and indoors. While positioning technologies involving wireless communication base...

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Bibliographic Details
Published in:Energies (Basel) 2021-05, Vol.14 (10), p.2759
Main Authors: Kim, Ji-In, Gang, Hui-Seon, Pyun, Jae-Young, Kwon, Goo-Rak
Format: Article
Language:English
Subjects:
Accuracy
Algorithms
Calibration
camera calibration
Cameras
Codes
Global positioning systems
GPS
Indoor environments
indoor positioning
Localization
Methods
Position measurement
QR code recognition
Radio frequency identification
Satellites
Sensors
Smartphones
Technology
Vision
Wireless access points
Wireless communications
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Summary:Numerous studies on positioning technology are ongoing for recognizing the positions of objects accurately. Vision-, sensor-, and signal-based technologies are combined for recognizing the positions of objects outdoors and indoors. While positioning technologies involving wireless communication based on sensors and signals are commonly used in outdoor environments, the performance becomes degraded in indoor environments. Therefore, a vision-based indoor positioning method using a QR code is proposed in this study. A user’s position is measured by determining the current position of a smartphone device accurately based on the QR code recognized with a smartphone camera. The direction, distance, and position are acquired using the relationship between the three-dimensional spatial coordinate information of the camera and the center point coordinates of a two-dimensional planar QR code obtained through camera calibration.
ISSN:1996-1073
1996-1073
DOI:10.3390/en14102759