Session:「Haptic for VR」

Haptic Revolver: Touch, Shear, Texture, and Shape Rendering on a Reconfigurable Virtual Reality Controller

論文URL: http://dl.acm.org/citation.cfm?doid=3173574.3173660

論文アブストラクト: We present Haptic Revolver, a handheld virtual reality controller that renders fingertip haptics when interacting with virtual surfaces. Haptic Revolver's core haptic element is an actuated wheel that raises and lowers underneath the finger to render contact with a virtual surface. As the user's finger moves along the surface of an object, the controller spins the wheel to render shear forces and motion under the fingertip. The wheel is interchangeable and can contain physical textures, shapes, edges, or active elements to provide different sensations to the user. Because the controller is spatially tracked, these physical features can be spatially registered with the geometry of the virtual environment and rendered on-demand. We evaluated Haptic Revolver in two studies to understand how wheel speed and direction impact perceived realism. We also report qualitative feedback from users who explored three application scenarios with our controller.

日本語のまとめ:

VR空間内で指先が仮想物体に触れると,デバイスの先端についた交換可能なホイールが,左右に回転して各仮想物体に適した触覚提示を行うコントローラを開発した. ユーザ評価から,振動による触覚提示よりも現実感があることを確認した.

Enabling People with Visual Impairments to Navigate Virtual Reality with a Haptic and Auditory Cane Simulation

論文URL: http://dl.acm.org/citation.cfm?doid=3173574.3173690

論文アブストラクト: Traditional virtual reality (VR) mainly focuses on visual feedback, which is not accessible for people with visual impairments. We created Canetroller, a haptic cane controller that simulates white cane interactions, enabling people with visual impairments to navigate a virtual environment by transferring their cane skills into the virtual world. Canetroller provides three types of feedback: (1) physical resistance generated by a wearable programmable brake mechanism that physically impedes the controller when the virtual cane comes in contact with a virtual object; (2) vibrotactile feedback that simulates the vibrations when a cane hits an object or touches and drags across various surfaces; and (3) spatial 3D auditory feedback simulating the sound of real-world cane interactions. We designed indoor and outdoor VR scenes to evaluate the effectiveness of our controller. Our study showed that Canetroller was a promising tool that enabled visually impaired participants to navigate different virtual spaces. We discuss potential applications supported by Canetroller ranging from entertainment to mobility training.

日本語のまとめ:

VR空間のナビゲートする白杖型触覚提示コントローラを開発した.このデバイスは反力,振動,聴覚フィードバックを組み合わせて提示することで,視覚障害を持っている人でもVR空間の空間認識や仮想物体を知覚することができる.

A Functional Optimization Based Approach for Continuous 3D Retargeted Touch of Arbitrary, Complex Boundaries in Haptic Virtual Reality

論文URL: http://dl.acm.org/citation.cfm?doid=3173574.3174118

論文アブストラクト: Passive or actuated physical props can provide haptic feedback, leading to a satisfying sense of presence and realism in virtual reality. However, the mismatch between the physical and virtual surfaces (boundaries) can diminish user experience. Haptic retargeting can overcome this limitation by utilizing visio-haptic effects. Previous investigations in haptic retargeting have focused on methods for point based position retargeting and techniques for remapping 2D shapes or simple 3D shape changes. Our approach extends haptic retargeting to complex, arbitrary shapes that provide a continuous mapping across all points on a boundary. This new approach also allows for multi-finger interaction. We describe a functional optimization to find the ideal spatial warping function with different goals: a maximum mapping smoothness, a minimum mismatch between the real and virtual world, or the combination of the two. We report on a preliminary user study of different optimization goals and elaborate potential applications through a set of demonstrations.

日本語のまとめ:

点だけでなく,なぞるような連続的な動作であっても実物体と仮想物体の形状不一致を最小限に抑える手法を提案した.実際にこの手法を用いて評価実験を行い,実際とVR空間の手の位置の差がなぞるような動作であっても違和感なく表現可能であることを確認した.

CLAW: A Multifunctional Handheld Haptic Controller for Grasping, Touching, and Triggering in Virtual Reality

論文URL: http://dl.acm.org/citation.cfm?doid=3173574.3174228

論文アブストラクト: CLAW is a handheld virtual reality controller that augments the typical controller functionality with force feedback and actuated movement to the index finger. Our controller enables three distinct interactions (grasping virtual object, touching virtual surfaces, and triggering) and changes its corresponding haptic rendering by sensing the differences in the user's grasp. A servo motor coupled with a force sensor renders controllable forces to the index finger during grasping and touching. Using position tracking, a voice coil actuator at the index fingertip generates vibrations for various textures synchronized with finger movement. CLAW also supports a haptic force feedback in the trigger mode when the user holds a gun. We describe the design considerations for CLAW and evaluate its performance through two user studies. The first study obtained qualitative user feedback on the naturalness, effectiveness, and comfort when using the device. The second study investigated the ease of the transition between grasping and touching when using our device.

日本語のまとめ:

携帯型触覚デバイス(CLAW)は,VR空間で仮想物体を掴む,仮想物体の表面を触る,トリガを引く時の3つの触覚パターンを提示可能である. CLAWは自然な触感を提示でき,触覚パターンの切り替えも容易だとユーザから評価された.