Transactions of the Institute of Systems, Control and Information Engineers
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ONLINE ISSN: 2185-811X
PRINT ISSN: 1342-5668

Transactions of the Institute of Systems, Control and Information Engineers Vol. 16 (2003), No. 4

  • Estimating the Distance to Free Area Boundary on a Train Platform from an Image

    pp. 151-157

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    DOI:10.5687/iscie.16.151

    Train platform is one of the most dangerous place for the blind. This paper presents a method for extracting free area (the region without obstacles) in train platform and estimating the distance to the boundary of free area from an image. First, the input image is segmented by using Gabor filter as well as greyscale information and edge information. Then the image region containing the place where the blind stands is determined as the free area. Next, the boundary of free area is extracted and the vertical lines are extracted, which are then used to determine the distance from the blind to the boundary of free area based on 3D vector analysis.
  • Gait Simulator Aimed at Free Walking

    pp. 158-165

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    DOI:10.5687/iscie.16.158

    We have developed a gait simulator aimed at free walking. Comparing with a popular treadmill this gait simulator provides more freedom, that is, this simulator can reproduce a straight walking, a turn, and a going up and down the stairs. This gait simulator has two foot plates. These plates are moved by three arms and follow the foot during swing phase, and this plate pulls back the foot dring stance phase. The fastest walking speed of this gait simulator reaches to 3km/h in a straight walking.
  • Adaptive Graphical User Interface By Updating Its Tree Structure

    pp. 166-173

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    DOI:10.5687/iscie.16.166

    This paper proposes a method for adaptive Graphical User Interface (GUI). GUI is represented as a tree structure. Adaptation is achieved by updating the tree structure of GUI by Genetic Programming like method for reducing the total number of user interaction. The method for dynamically generating predictive GUI is also presented. With the method, the predictive GUI is generated by composing GUI elements used in old user interaction.
  • Dialog System for Service Robot

    pp. 174-182

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    DOI:10.5687/iscie.16.174

    In this research, we develop a dialog system for a service robot which brings user-specified objects such as cans, bottles, and PET bottles from a refrigerator to a physically handicapped user. This paper describes two of the functions that are necessary for the system : one is the function to recognize objects in the image by using a dialog with a user; the other is the one to estimate a meaning of a word which is not registered. When the system cannot recognize specified objects automatically, it obtains necessary information by interacting with the user by speech, and tries to recognize the target object. When the system detects a word which is not registered, the system estimates its meaning by using a model of probability and registers it. We show the validity of these functions by experiments with real refrigerator scenes.
  • Modeling Virtual Cloth to Display Realistic Shape and Force Based on Physical Data

    pp. 183-190

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    DOI:10.5687/iscie.16.183

    In this paper, we have proposed the modeling of cloth that realizes force together with shape to manipulate the virtual cloth. Researchers, in the community of computer graphics, have simulated only the realistic shape of cloth. However, it is also important to display the force generated from cloth for the environment where user manipulates the cloth with visual and haptic feedback. Inclusion of force with shape requires to simulate shape and force, based on the relation between them. The real relationship between shape and force can be measured by special device called “Kawabata Evaluation System (KES)”. However, a cloth has hysteretic property, and relation between shape and force depends on the history of manipulation. KES data only describes incomplete unilateral relations between force and shape under specific histories of manipulation. Although there exists some previous work that simulates the shape of the cloth based on KES data, it is insufficient to simulate both shape and force considering their hysteretic relation. This paper discusses how to model a virtual cloth to simulate shape and force with realities by interpolating empirical data obtained from KES, considering their limitation due to the hysteresis.

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