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  • SAGE Publications  (3)
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  • SAGE Publications  (3)
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  • 1
    Online Resource
    Online Resource
    SAGE Publications ; 2013
    In:  International Journal of Advanced Robotic Systems Vol. 10, No. 1 ( 2013-01-01), p. 15-
    In: International Journal of Advanced Robotic Systems, SAGE Publications, Vol. 10, No. 1 ( 2013-01-01), p. 15-
    Abstract: In this paper, we propose an online key object discovery and tracking system based on visual saliency. We formulate the problem as a temporally consistent binary labelling task on a conditional random field and solve it by using a particle filter. We also propose a context-aware saliency measurement, which can be used to improve the accuracy of any static or dynamic saliency maps. Our refined saliency maps provide clearer indications as to where the key object lies. Based on good saliency cues, we can further segment the key object inside the resulting bounding box, considering the spatial and temporal context. We tested our system extensively on different video clips. The results show that our method has significantly improved the saliency maps and tracks the key object accurately.
    Type of Medium: Online Resource
    ISSN: 1729-8814 , 1729-8814
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2013
    detail.hit.zdb_id: 2202393-8
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  • 2
    Online Resource
    Online Resource
    SAGE Publications ; 2013
    In:  International Journal of Advanced Robotic Systems Vol. 10, No. 1 ( 2013-01-01), p. 12-
    In: International Journal of Advanced Robotic Systems, SAGE Publications, Vol. 10, No. 1 ( 2013-01-01), p. 12-
    Abstract: Localizationis of vital importance for an unmanned vehicle to drive on the road. Most of the existing algorithms are based on laser range finders, inertial equipment, artificial landmarks, distributing sensors or global positioning system(GPS) information. Currently, the problem of localization with vision information is most concerned. However, vision-based localization techniquesare still unavailable for practical applications. In this paper, we present a vision-based sequential probability localization method. This method uses the surface information of the roadside to locate the vehicle, especially in the situation where GPS information is unavailable. It is composed of two step, first, in a recording stage, we construct a ground truthmap with the appearance of the roadside environment. Then in an on-line stage, we use a sequential matching approach to localize the vehicle. In the experiment, we use two independent cameras to observe the environment, one is left-orientated and the other is right. SIFT features and Daisy features are used to represent for the visual appearance of the environment. The experiment results show that the proposed method could locate the vehicle in a complicated, large environment with high reliability.
    Type of Medium: Online Resource
    ISSN: 1729-8814 , 1729-8814
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2013
    detail.hit.zdb_id: 2202393-8
    Location Call Number Limitation Availability
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  • 3
    Online Resource
    Online Resource
    SAGE Publications ; 2011
    In:  International Journal of Advanced Robotic Systems Vol. 8, No. 1 ( 2011-03-01), p. 7-
    In: International Journal of Advanced Robotic Systems, SAGE Publications, Vol. 8, No. 1 ( 2011-03-01), p. 7-
    Abstract: Global localization problem is one of the classical and important problems in mobile robot. In this paper, we present an approach to solve robot global localization in indoor environments with grid map. It combines Hough Scan Matching (HSM) and grid localization method to get the initial knowledge of robot's pose quickly. For pose tracking, a scan matching technique called Iterative Closest Point (ICP) is used to amend the robot motion model, this can drastically decreases the uncertainty about the robot's pose in prediction step. Then accurate proposal distribution taking into account recent observation is introduced into particle filters to recover the best estimate of robot trajectories, which seriously reduces number of particles for pose tracking. The proposed approach can globally localize mobile robot fast and accurately. Experiment results carried out with robot data in indoor environments demonstrates the effectiveness of the proposed approach.
    Type of Medium: Online Resource
    ISSN: 1729-8814 , 1729-8814
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2011
    detail.hit.zdb_id: 2202393-8
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
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