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In this paper, a feasibility study is conducted to estimate the pose of a vehicle based on a mono-camera using road direction signs and a public online database. The proposed algorithm uses a mono-camera to detect and segment the road direction sign and matches the detected sign image with the reference image in the database to calculate the relative pose between the road sign and the vehicle. Using...
The reliability of Global Navigation Satellite System (GNSS) has been very important according to an ever-increasing dependency on GNSS in the position, navigation, and timing (PNT) applications. Nevertheless, there is still a distinctive weakness that GNSS signal is easily damaged by the jamming attack. GNSS jamming incident is considered to be an act of provocation that poses a threat to the security...
Use of a Quadrotor is considered as one of the methods to inspect infrastructures such as a tunnel or a bridge. In such a case, it needs to control the position of the airframe. Note, however, that it is difficult to realize the position control using GPS in environments, such as in a tunnel or under a bridge, because there is a problem, such as the weakness of the GPS signal or the incomplete reaching...
We consider the problem of area coverage for robot teams operating under resource constraints, while modeling spatio-temporal environmental phenomena. The aim of the mobile robot team is to avoid exhaustive search and only visit the most important locations that can improve the prediction accuracy of a spatio-temporal model. We use a Gaussian Process (GP) to model spatially varying and temporally...
This study was undertaken to establish basic technologies and knowledge of aerial photography and its application to support safe rowing. For the water sport of rowing, managers and coaches use a motorboat to follow a rowing boat for coaching and safe rowing observation. Utilization of a motorboat gives rise to numerous problems in terms of pulled waves, narrow visual ranges, limited tracking of boats...
This paper proposes a method for fused navigation of an unmanned marine surface vehicle (UMSV). The method also detects the outlier and interference of global positioning system (GPS) simultaneously. The method fuses available sensor measurements through extended Kalman filter (EKF) to find the location and attitude of the vehicle. The method uses error covariance of estimated location for detection...
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