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Sensors 2013, 13(1), 119-136;

GPS-Supported Visual SLAM with a Rigorous Sensor Model for a Panoramic Camera in Outdoor Environments

Center for Spatial Information Science (CSIS), University of Tokyo, Chiba 277-8568, Japan
School of Remote Sensing and Information Engineering, Wuhan University, Wuhan 430079, China
Department of Environmental and Information Studies, Tokyo City University, Yokohama 222-0033, Japan
Author to whom correspondence should be addressed.
Received: 19 October 2012 / Revised: 28 November 2012 / Accepted: 18 December 2012 / Published: 21 December 2012
(This article belongs to the Special Issue State-of-the-Art Sensors Technology in Japan 2012)
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Accurate localization of moving sensors is essential for many fields, such as robot navigation and urban mapping. In this paper, we present a framework for GPS-supported visual Simultaneous Localization and Mapping with Bundle Adjustment (BA-SLAM) using a rigorous sensor model in a panoramic camera. The rigorous model does not cause system errors, thus representing an improvement over the widely used ideal sensor model. The proposed SLAM does not require additional restrictions, such as loop closing, or additional sensors, such as expensive inertial measurement units. In this paper, the problems of the ideal sensor model for a panoramic camera are analysed, and a rigorous sensor model is established. GPS data are then introduced for global optimization and georeferencing. Using the rigorous sensor model with the geometric observation equations of BA, a GPS-supported BA-SLAM approach that combines ray observations and GPS observations is then established. Finally, our method is applied to a set of vehicle-borne panoramic images captured from a campus environment, and several ground control points (GCP) are used to check the localization accuracy. The results demonstrated that our method can reach an accuracy of several centimetres. View Full-Text
Keywords: panoramic camera; visual SLAM; bundle adjustment; GPS panoramic camera; visual SLAM; bundle adjustment; GPS

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This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Shi, Y.; Ji, S.; Shi, Z.; Duan, Y.; Shibasaki, R. GPS-Supported Visual SLAM with a Rigorous Sensor Model for a Panoramic Camera in Outdoor Environments. Sensors 2013, 13, 119-136.

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