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Sensors 2013, 13(7), 9047-9069; doi:10.3390/s130709047

Seamless Positioning and Navigation by Using Geo-Referenced Images and Multi-Sensor Data

School of Civil and Environmental Engineering, University of New South Wales, Sydney 2052, NSW, Australia
Author to whom correspondence should be addressed.
Received: 3 May 2013 / Revised: 13 June 2013 / Accepted: 7 July 2013 / Published: 12 July 2013
(This article belongs to the Section Remote Sensors)


Ubiquitous positioning is considered to be a highly demanding application for today’s Location-Based Services (LBS). While satellite-based navigation has achieved great advances in the past few decades, positioning and navigation in indoor scenarios and deep urban areas has remained a challenging topic of substantial research interest. Various strategies have been adopted to fill this gap, within which vision-based methods have attracted growing attention due to the widespread use of cameras on mobile devices. However, current vision-based methods using image processing have yet to revealed their full potential for navigation applications and are insufficient in many aspects. Therefore in this paper, we present a hybrid image-based positioning system that is intended to provide seamless position solution in six degrees of freedom (6DoF) for location-based services in both outdoor and indoor environments. It mainly uses visual sensor input to match with geo-referenced images for image-based positioning resolution, and also takes advantage of multiple onboard sensors, including the built-in GPS receiver and digital compass to assist visual methods. Experiments demonstrate that such a system can greatly improve the position accuracy for areas where the GPS signal is negatively affected (such as in urban canyons), and it also provides excellent position accuracy for indoor environments.
Keywords: positioning; GPS; geo-reference; image; vision; digital compass positioning; GPS; geo-reference; image; vision; digital compass
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Li, X.; Wang, J.; Li, T. Seamless Positioning and Navigation by Using Geo-Referenced Images and Multi-Sensor Data. Sensors 2013, 13, 9047-9069.

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