Browsing by Author "Peiris, Roshan Lalintha"

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FacePush: Experiencing Pressure Forces on Face with HMDs
(2018-01-01)
Chang, Hong-Yu
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Tseng, Wen-Jie
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Tsai, Chia-En
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Chen, Hsin-Yu
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Peiris, Roshan Lalintha
FacePush: Introducing Normal Force on Face with Head-Mounted Displays
(2018-01-01)
Chang, Hong-Yu
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Tseng, Wen-Jie
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Tsai, Chia-En
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Chen, Hsin-Yu
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Peiris, Roshan Lalintha
This paper presents FacePush, a Head-Mounted Display (HMD) integrated with a pulley system to generate normal forces on a user's face in virtual reality (VR). The mechanism of FacePush is obtained by shifting torques provided by two motors that press upon a user's face via utilization of a pulley system. FacePush can generate normal forces of varying strengths and apply those to the surface of the face. To inform our design of FacePush for noticeable and discernible normal forces in VR applications, we conducted two studies to identify the absolute detection threshold and the discrimination threshold for users' perception. After further consideration in regard to user comfort, we determined that two levels of force, 2.7 kPa and 3.375 kPa, are ideal for the development of the FacePush experience via implementation with three applications which demonstrate use of discrete and continuous normal force for the actions of boxing, diving, and 360 guidance in virtual reality. In addition, with regards to a virtual boxing application, we conducted a user study evaluating the user experience in terms of enjoyment and realism and collected the user's feedback.
LiquidReality: Wetness Sensations on the Face for Virtual Reality
(2018-01-01)
Peiris, Roshan Lalintha
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Chan, Liwei
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Minamizawa, Kouta
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交大名義發表
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National Chiao Tung University
We present LiquidReality, a wearable system that simulates wetness sensations directly on the user's face for immersive virtual reality applications. The LiquidReality system consists of a headmounted display integrated with thermal and vibrotactile modules that provides co-located haptic feedback with the displayed visuals. With this system, we conducted a preliminary study that evaluated nine types of thermal and thermal/vibrotactile stimuli to induce a wetness sensation on the user's face. Our results indicate that thermal only stimuli and low frequency vibrotactile stimuli (combined with thermal) induced better wetness perception. Next, using the results from this preliminary study, we evaluated the immersion enhancement when using the LiquidReality system in combination with related visuals. The results indicate that using the LiquidReality system with related visuals, enhances the level of immersion for the user.
SeeingHaptics: Visualizations for Communicating Haptic Designs
(2019-01-01)
Chan, Liwei
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Chen, Mu-Hsuan
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Ho, Wen-Chi
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Peiris, Roshan Lalintha
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Chen, Bing-Yu
Rendering haptic feedback in virtual reality is a common approach to enhancing the immersion of virtual reality content. However, current editing tools allow developers to access the haptic feedback only through physical contact with the actuators, making it difficult to fast iterate haptic interaction designs. This paper introduces SeeingHaptics, an authoring tool which visualizes haptic properties in 3D scenes. The active area of certain feedback is simulated with mesh shapes, while the 2D icons allow for indicating the type of haptic sensation. Our evaluation showed that SeeingHaptics helps developers rapidly create haptic feedbacks after a short training session.
ThermoVR: Exploring Integrated Thermal Haptic Feedback with Head Mounted Displays
(2017-01-01)
Peiris, Roshan Lalintha
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Peng, Wei
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Chen, Zikun
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Chan, Liwei
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Minamizawa, Kouta
Head Mounted Displays (HMDs) provide a promising opportunity for providing haptic feedback on the head for an enhanced immersive experience. In ThermoVR, we integrated five thermal feedback modules on the HMD to provide thermal feedback directly onto the user's face. We conducted evaluations with 15 participants using two approaches: Firstly, we provided simultaneously actuated thermal stimulations (hot and cold) as directional cues and evaluated the accuracy of recognition; secondly, we evaluated the overall immersive thermal experience that the users experience when provided with thermal feedback on the face. Results indicated that the recognition accuracy for cold stimuli were of approx. 89.5% accuracy while the accuracy for hot stimuli were 68.6%. Also, participants reported that they felt a higher level of immersion on the face when all modules were simultaneously stimulated (hot and cold). The presented applications demonstrate the ThermoVR's directional cueing and immersive experience.