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- W829366144 abstract "Skid-steered robots are widely used as mobile platforms for machine vision systems. However it is hard to achieve a stable motion of such robots along desired trajectory due to an unpredictable wheel slip. It is possible to compensate the unpredictable wheel slip and stabilize the motion of the robot using visual odometry. This paper presents a fast optical flow based algorithm for estimation of instantaneous center of rotation, angular and longitudinal speed of the robot. The proposed algorithm is based on Horn–Schunck variational optical flow estimation method. The instantaneous center of rotation and motion of the robot is estimated by back projection of optical flow field to the ground surface. The developed algorithm was tested using skid-steered mobile robot. The robot is based on a mobile platform that includes two pairs of differential driven motors and a motor controller. Monocular visual odometry system consisting of a singleboard computer and a low cost webcam is mounted on the mobile platform. A state-space model of the robot was derived using standard black-box system identification. The input (commands) and the output (motion) were recorded using a dedicated external motion capture system. The obtained model was used to control the robot without visual odometry data. The paper is concluded with the algorithm quality estimation by comparison of the trajectories estimated by the algorithm with the data from motion capture system." @default.
- W829366144 created "2016-06-24" @default.
- W829366144 creator A5065934992 @default.
- W829366144 date "2015-06-21" @default.
- W829366144 modified "2023-09-23" @default.
- W829366144 title "Fast instantaneous center of rotation estimation algorithm for a skied-steered robot" @default.
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- W829366144 doi "https://doi.org/10.1117/12.2184834" @default.
- W829366144 hasPublicationYear "2015" @default.
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