Browsing by Author "Koike, Hideki"

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    AR based Self-sports Learning System using Decayed Dynamic TimeWarping Algorithm
    (The Eurographics Association, 2018) Ikeda, Atsuki; Hwang, Dong Hyun; Koike, Hideki; Bruder, Gerd and Yoshimoto, Shunsuke and Cobb, Sue
    A self-sports learning system that provides users with real-time multimodal feedback about differences between a user's motion and an expert's motion is proposed. We also propose the Decayed Dynamic Time Warping algorithm, which allows the user to change the motion speed dynamically and repeat a target motion without additional operations. The user can thus imitate an expert's motion conveniently and accurately. The proposed system involves training and replay modes. In the training mode, the system provides audio-visual feedback to help the user imitate the expert's motion. The replay mode allows the user to compare their motion to that of the expert. An augmented reality head-mounted display delivers feedback and provides an immersive three-dimensional training experience.
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    Gaze Guidance in the Real-world by Changing Color Saturation of Objects
    (The Eurographics Association, 2022) Miyamoto, Junpei; Koike, Hideki; Amano, Toshiyuki; Hideaki Uchiyama; Jean-Marie Normand
    In this study, we propose a method for real-world gaze guidance by projecting an image onto a real-world object and changing its appearance based on visual saliency. In the proposed method, an image of the object is first acquired. Next, the image is changed such that the visual prominence of the object is increased and the image is changed so that the visual prominence of other parts of the object is decreased. Finally, the modified image is re-projected onto the object itself. Consequently, the object's appearance and visual prominence are altered, and the user's gaze is focused on the desired object. In this study, we propose an image processing method that changes the saturation of an object. We call this the "saturation filter." A coaxial projector-camera system was used to apply the proposed gaze guidance method proposed in this study to a 3D object. The coaxial projector-camera system does not need to be recalibrated when an object moves. In this study, two experiments were conducted to verify the effectiveness of the proposed method in guiding a viewer's gaze. As a result, it was confirmed that the proposed method can achieve the effect of gaze guidance.
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    OmniTiles - A User-Customizable Display Using An Omni-Directional Camera Projector System
    (The Eurographics Association, 2022) Hoffard, Jana; Miyafuji, Shio; Pardomuan, Jefferson; Sato, Toshiki; Koike, Hideki; Hideaki Uchiyama; Jean-Marie Normand
    We present OmniTiles, a manually changeable interface that enables the user to customize their own display. This is achieved by using tiles in basic shapes that are clipped together via magnets. The created structures are then placed on top of a cameraprojector set up to track the single tiles and project onto them. The generation of different structures requires no activation mechanism or prior technical knowledge by the user. The 3D printed tiles are robust and cost-efficient, making the system particularly suited for non-experts such as families with children. First, we explain the creation process of our tiles and the implementation of the system. We then demonstrate the flexibility of our system via applications unique to our tile approach and discuss the limitations and future plans for our system.