Path Routing Optimization for STM Ultrasound Rendering

Barreiro, Héctor; Sinclair, Stephen; Otaduy, Miguel Á.

doi:10.1109/toh.2019.2963647

Cited by 15 publications

(4 citation statements)

References 14 publications

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“…We used an HTC VIVE Pro head-mounted display (HMD) for VR, OptiTrack for tracking, and the Ultrahaptics STRATOS Explore ultrasound haptic device by Ultraleap Ltd. To render the ultrasound feedback, we adapted the PRO-STM algorithm by Barreiro et al [48]. Instead of the pressure field in PRO-STM algorithm, we found the contact points between the participant's virtual hand and the avatar hand.…”

Section: B Apparatusmentioning

confidence: 99%

Mediated Social Touching: Haptic Feedback Affects Social Experience of Touch Initiators

Maunsbach,

Hornbæk,

Seifi

2023

2023 IEEE World Haptics Conference (WHC)

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Mediated social touch enables us to share hugs, handshakes, and caresses at a distance. Past work has focused on the experience of being touched by a remote person, but the touch initiator's experience is underexplored. We ask whether a variation in haptic feedback can influence the touch initiator's social experience of the interaction. In a user study participants stroked a remote person's hand in virtual reality while feeling no haptic feedback, ultrasonic stimulation, or passive feedback from a silicone hand. In each condition, they rated the pleasantness of the interaction, the friendliness of the remote person, and their sense of co-presence. We also captured the velocity of their stroking and asked for reflections on the interaction and mediated social touch as a whole. The results show significant effects of haptic feedback on co-presence, pleasantness, and stroking velocity. The qualitative responses suggest that these results are due to the familiarity of the solid silicone hand, and the participants' assumption that when they felt feedback, the remote person felt similar feedback.

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Section: B Apparatusmentioning

confidence: 99%

Mediated Social Touching: Haptic Feedback Affects Social Experience of Touch Initiators

Maunsbach,

Hornbæk,

Seifi

2023

2023 IEEE World Haptics Conference (WHC)

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“…Since UMH relies on a fluid coupling between the actuator and the skin (vibrations and pressure are transmitted through the air), physical properties that can be rendered in an ecological manner encompass interactions with fluids ( [4,38]). Barreiro et al [4] simulate the pressure field on the surface of the skin as a result of the hand coming into contact with virtual fluids, then use a custom algorithm to extract an STM stimulus path and intensity modulation from the data in interactive time.…”

Section: Umh Renderingmentioning

confidence: 99%

Ultrasound Mid-Air Tactile Feedback for Immersive Virtual Reality Interaction

Howard

Marchal

Pacchierotti

2022

Human–Computer Interaction Series

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Ultrasound mid-air haptic (UMH) devices are promising for tactile feedback in virtual reality (VR), as they do not require users to be tethered to, hold, or wear any device. This approach is less cumbersome, easy to set up, can simplify tracking, and leaves the hands free for concurrent interactions. This chapter explores work conducted at CNRS-IRISA dealing with the challenges arising from the integration of UMH interfaces in immersive VR through three main axes. These are discussed in the wider context of the state-of-the-art on UMH for augmented and virtual reality, and illustrated through several VR use-cases. A first axis deals with device integration into the VR ecosystem. Interaction in immersive VR is based on the synergy between complex input devices allowing real-time tracking of the user and multimodal feedback devices delivering a coherent visual, auditory and haptic picture of a simulated virtual environment (VE). Using UMH in immersive VR therefore hinges on integrating UMH devices such that their operation does not interfere with other input and feedback devices. It is also critical to ensure that UMH feedback is adequately synchronised and co-located with respect to other stimuli, and delivered within a workspace that is compatible with that of VR interaction. Regarding this final point, we propose PUMAH, a robotic solution for increasing the usable workspace of UMH devices. The second and third axes, respectively, focus on stimulus perception and rendering of VE properties. Virtual object properties can be rendered in a variety of ways, through e.g. amplitude modulation (AM) or spatio-temporal modulation (STM), with many parameters (modulation frequency, spatial sampling, etc.) coming into play, raising questions about the limits of the design space. To tackle this challenge, we begin by conducting psychophysical experimentation to understand the usable ranges for stimulus parameters and understand the perceptual implications of stimulus design choices. We propose an open-source software framework intended to facilitate UMH stimulus design and perceptual evaluation. These results in turn serve as the basis for the design and evaluation of rendering schemes for VR. Using amplitude variations along a focal point path in STM, we investigate the possibility of rendering geometric details and in a second step, sensations of stiffness in VR.

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“…Since then, we have seen a rapid increase in phase and amplitude resolution thus improving the granularity of the resulting target field and the number of focus points that can be generated simultaneously. There has also been a rapid increase in computational solving speed thus improving the refresh rate at which focal point properties can be changed, in turn enabling the rendering of more advanced haptic sensations such as multi-point STM [20] and PRO-STM [21]. Higher refresh rates allow for smoother transitions between fields thus influencing the amount of unwanted audible sounds, a byproduct of abruptly changing acoustic fields [22].…”

Section: Haptic Sensations and Rendering Algorithmsmentioning

confidence: 99%

Mid-Air Haptics: Future Challenges and Opportunities

Georgiou

Frier

Freeman

et al. 2022

Ultrasound Mid-Air Haptics for Touchless Interfaces

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Ultrasound mid-air haptic technology has advanced in many ways over the past decade and has found meaningful application in a plethora of use cases. As the technology matures further and progresses from lab to market, in this chapter, we take a step back and discuss three specific directions that we think could result in the greatest impact. Namely, we highlight challenges and opportunities in improving (1) the hardware platforms used, (2) the rendering algorithms employed to create rich haptic sensations, and (3) the resulting user experience and added value the technology can instill to different end-user applications. We hope that this "wishlist" inspires the mid-air haptics and human computer interaction (HCI) community and others to join our efforts toward a deeper technology understanding, integration, and readiness.

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Path Routing Optimization for STM Ultrasound Rendering

Cited by 15 publications

References 14 publications

Mediated Social Touching: Haptic Feedback Affects Social Experience of Touch Initiators

Mediated Social Touching: Haptic Feedback Affects Social Experience of Touch Initiators

Ultrasound Mid-Air Tactile Feedback for Immersive Virtual Reality Interaction

Mid-Air Haptics: Future Challenges and Opportunities

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