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Author: Oktem, RusenPublisher: Ieee

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Now showing 1 - 3 of 3
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    Conference Object
    An Rfid Based Location Finding and Tracking With Guidance
    (Ieee, 2008) Oktem, Rusen; Aydin, Elif Uray; Cagiltay, Nergiz Ercil
    This paper tackles an RFID based location finding and tracking system. The system is an integral part of a navigation aid being developed for guiding visually disabled people in a store. The aid is composed of a portable hardware interface unit, a standalone RFID unit, and a central processing unit. The units interact via wireless communication to locate the position of the user in a known indoor environment and tracking his/her movement. An active RFID tag helps to estimate the location of a user and the user is guided to follow a route accordingly, via a tactile compass. The system uses RF signal strengths and is based on Bayes Decision Theory. Initial simulation results with the system prove promising for location finding and tracking, especially when the tracked person is guided by a system.
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    Conference Object
    A Segmentation Algorithm for Foreground/Background Extraction
    (Ieee, 2006) Oktem, Rusen; Guldogan, Esin; Gabbouj, Moncef
    This paper describes a three-pass segmentation algorithm followed by a foreground/background extraction rule. Being imperfect, the basic objective of the proposed segmentation is to enable the extraction of objects that may be of main interest to the user, and the background. The formed segments are assigned points, according to the location of their center of mass and bounding box coordinates, and spatial dispersion. Each segment is labelled as foreground or background in compliance with the grade point they get.
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    Conference Object
    An Indoor Navigation Aid Designed for Visually Impaired People
    (Ieee, 2008) Oktem, Rusen; Aydin, Elif; Cagiltay, Nergiz Ercil
    This work introduces the hardware architecture and general principles of a portable indoor navigation system for guiding visually impaired people. It operates through wireless communication between a compact hardware interface unit carried by the user, a central processing unit and an active RFID unit. The RFID unit collects signals as regard to the position of the user, the central system processes those signals to estimate the position of the user and proposes a route and direction for the user to follow, whereas hardware interface unit provides interaction. The orienteering of the user is obtained by a tactile compass.