Exploring Fingers’ Limitation of Texture Density Perception on Ultrasonic Haptic Displays

Kalantari, Farzan; Gueorguiev, David; Lank, Edward; Bremard, Nicolas; Grisoni, Laurent

doi:10.1007/978-3-319-93445-7_31

Cited by 4 publications

(3 citation statements)

References 27 publications

(24 reference statements)

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“…These results can be interpreted to mean that when there is lateral finger movement, participants needed a similar amount of electrovibration force for each moving finger for sensory detection. Such a phenomenon has also been observed in previous studies conducted with a variety of other haptic devices [29,30].…”

Section: Two-finger Interactionssupporting

confidence: 81%

Finger motion and contact by a second finger influence the tactile perception of electrovibration

Vardar

Kuchenbecker

2021

J. R. Soc. Interface.

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Electrovibration holds great potential for creating vivid and realistic haptic sensations on touchscreens. Ideally, a designer should be able to control what users feel independent of the number of fingers they use, the movements they make, and how hard they press. We sought to understand the perception and physics of such interactions by determining the smallest 125 Hz electrovibration voltage that 15 participants could reliably feel when performing four different touch interactions at two normal forces. The results proved for the first time that both finger motion and contact by a second finger significantly affect what the user feels. At a given voltage, a single moving finger experiences much larger fluctuating electrovibration forces than a single stationary finger, making electrovibration much easier to feel during interactions involving finger movement. Indeed, only about 30% of participants could detect the stimulus without motion. Part of this difference comes from the fact that relative motion greatly increases the electrical impedance between a finger and the screen, as shown via detailed measurements from one individual. By contrast, threshold-level electrovibration did not significantly affect the coefficient of kinetic friction in any conditions. These findings help lay the groundwork for delivering consistent haptic feedback via electrovibration.

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Section: Two-finger Interactionssupporting

confidence: 81%

Finger motion and contact by a second finger influence the tactile perception of electrovibration

Vardar

Kuchenbecker

2021

J. R. Soc. Interface.

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“…Our current system has limited support for roughness modulation on a small area of the user's skin, specifically the fingerpad, and it is challenging to expand it to cover larger areas like the palm. However, existing research [75] has shown that the index finger and thumb are the most sensitive for haptic perception, suggesting the possibility of using multiple finger-worn haptic devices to support more manipulation gestures in MR environments. In the future, we plan to expand our exploration of roughness modulation to include more types of materials, such as resin or ABS material, as we showed in Fig.…”

Section: Limitations and Future Workmentioning

confidence: 99%

Multi-modal Transformer-based Tactile Signal Generation for Haptic Texture Simulation of Materials in Virtual and Augmented Reality

Cai

Zhu

2022

2022 IEEE International Symposium on Mixed and Augmented Reality Adjunct (ISMAR-Adjunct)

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Extensive research has been done in haptic feedback for texture simulation in virtual reality (VR). However, it is challenging to modify the perceived tactile texture of existing physical objects which usually serve as anchors for virtual objects in mixed reality (MR). In this paper, we present ViboPneumo, a finger-worn haptic device that uses vibratory-pneumatic feedback to modulate (i.e., increase and decrease) the perceived roughness of the material surface contacted by the user's fingerpad while supporting the perceived sensation of other haptic properties (e.g., temperature or stickiness) in MR. Our device includes a silicone-based pneumatic actuator that can lift the user's fingerpad on the physical surface to reduce the contact area for roughness decreasing, and an on-finger vibrator for roughness increasing. Our user-perception experimental results showed that the participants could perceive changes in roughness, both increasing and decreasing, compared to the original material surface. We also observed the overlapping roughness ratings among certain haptic stimuli (i.e., vibrotactile and pneumatic) and the originally perceived roughness of some materials without any haptic feedback. This suggests the potential to alter the perceived texture of one type of material to another in terms of roughness (e.g., modifying the perceived texture of ceramics as glass). Lastly, a user study of MR experience showed that ViboPneumo could significantly improve the MR user experience, particularly for visual-haptic matching, compared to the condition of a bare finger. We also demonstrated a few application scenarios for ViboPneumo.

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“…Thus far, most of the studies on tactile perception conducted on these devices were focused on perception thresholds of friction, size or sharpness (Biet et al, 2007;Samur et al, 2009;Kalantari et al, 2016;Kalantari et al, 2018b;Kalantari et al, 2018a). In the context of interaction design however, many opportunities will arise from the ability of rendering tactile textures that provide users with specific perceptual sensations (i.e.…”

Section: Related Workmentioning

confidence: 99%

Investigating the Semantic Perceptual Space of Synthetic Textures on an Ultrasonic based Haptic Tablet

Dariosecq

Plénacoste

Berthaut

et al. 2020

Proceedings of the 15th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Application

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This paper aims to investigate the semantic perceptual space of synthetic tactile textures rendered via an ultrasonic based haptic tablet and the parameters influencing this space. Through a closed card sorting task, 30 participants had to explore 32 tactile-only textures and describe each texture using adjectives. A factorial analysis of mixed data was conducted. Results suggest a 2 dimensional space with tactile textures belonging to a continuum of rough to smooth adjectives. Influence of waveform and amplitude is shown to play an important role in perceiving a texture as smooth or rough, and spatial period is a possible modulator of different degrees of roughness or smoothness. Finally, we discuss how these findings can be used by designers on tactile feedback devices.

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Exploring Fingers’ Limitation of Texture Density Perception on Ultrasonic Haptic Displays

Cited by 4 publications

References 27 publications

Finger motion and contact by a second finger influence the tactile perception of electrovibration

Finger motion and contact by a second finger influence the tactile perception of electrovibration

Multi-modal Transformer-based Tactile Signal Generation for Haptic Texture Simulation of Materials in Virtual and Augmented Reality

Investigating the Semantic Perceptual Space of Synthetic Textures on an Ultrasonic based Haptic Tablet

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