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Concurrent Initialization for Bearing-Only SLAM
Automatic Control Department, Technical University of Catalonia, c/ Pau Gargallo, 5 E-08028 Barcelona, Spain
* Author to whom correspondence should be addressed.
Received: 18 December 2009; in revised form: 15 February 2010 / Accepted: 24 February 2010 / Published: 1 March 2010
Abstract: Simultaneous Localization and Mapping (SLAM) is perhaps the most fundamental problem to solve in robotics in order to build truly autonomous mobile robots. The sensors have a large impact on the algorithm used for SLAM. Early SLAM approaches focused on the use of range sensors as sonar rings or lasers. However, cameras have become more and more used, because they yield a lot of information and are well adapted for embedded systems: they are light, cheap and power saving. Unlike range sensors which provide range and angular information, a camera is a projective sensor which measures the bearing of images features. Therefore depth information (range) cannot be obtained in a single step. This fact has propitiated the emergence of a new family of SLAM algorithms: the Bearing-Only SLAM methods, which mainly rely in especial techniques for features system-initialization in order to enable the use of bearing sensors (as cameras) in SLAM systems. In this work a novel and robust method, called Concurrent Initialization, is presented which is inspired by having the complementary advantages of the Undelayed and Delayed methods that represent the most common approaches for addressing the problem. The key is to use concurrently two kinds of feature representations for both undelayed and delayed stages of the estimation. The simulations results show that the proposed method surpasses the performance of previous schemes.
Keywords: bearing-sensor; SLAM; robotics
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Cite This Article
MDPI and ACS Style
Munguía, R.; Grau, A. Concurrent Initialization for Bearing-Only SLAM. Sensors 2010, 10, 1511-1534.
Munguía R, Grau A. Concurrent Initialization for Bearing-Only SLAM. Sensors. 2010; 10(3):1511-1534.
Munguía, Rodrigo; Grau, Antoni. 2010. "Concurrent Initialization for Bearing-Only SLAM." Sensors 10, no. 3: 1511-1534.