Three-dimensional VLC indoor positioning system using smart device camera receiver with image processing technique

P. Rattakorn; U. Mankong; S. Potha

doi:10.1117/12.2553400

11 March 2020 Three-dimensional VLC indoor positioning system using smart device camera receiver with image processing technique

P. Rattakorn, U. Mankong, S. Potha

Author Affiliations +

Proceedings Volume 11331, Fourth International Conference on Photonics Solutions (ICPS2019); 113310C (2020) https://doi.org/10.1117/12.2553400
Event: Fourth International Conference on Photonic Solutions (ICPS 2019), 2019, Chiang Mai, Thailand

Abstract

In this paper, we propose a three-dimensional VLC indoor positioning system using smart device camera receiver whereby the rolling shutter effect of CMOS camera sensor to detect the encoded identification data and necessary information regarding transmitter positions from the individual LEDs. No prior assumptions have been made regarding each LED transmit power, this allows for non-identical LEDs and their power deterioration over time. Images of 4 LEDs are required to estimate the receiver position. In the image capturing process, it is necessary to adjust the exposure setting. The captured images are processed by converting them to black and white where the black and white stripes may be decoded. Then by applying a different threshold, we propose a method to use the white pixel area (counted in number of pixels), corresponding to each LED image, to estimate the distance between each LED and the receiver. These estimations are used in trilateration algorithm to determine the receiver position. Through proper calibration, the position error is within 10 cm.

Citation Download Citation

P. Rattakorn, U. Mankong, and S. Potha "Three-dimensional VLC indoor positioning system using smart device camera receiver with image processing technique", Proc. SPIE 11331, Fourth International Conference on Photonics Solutions (ICPS2019), 113310C (11 March 2020); https://doi.org/10.1117/12.2553400

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available