2020-02412 - PhD Position F/M Tactile User Interfaces for Virtual Reality using High-Density Electrotactile Feedback
Le descriptif de l’offre ci-dessous est en Anglais

Type de contrat : CDD

Niveau de diplôme exigé : Bac + 5 ou équivalent

Autre diplôme apprécié : Master on Human Computer Interaction or equivalent

Fonction : Doctorant

A propos du centre ou de la direction fonctionnelle

Inria, the French national research institute for the digital sciences, promotes scientific excellence and technology transfer to maximise its impact.
It employs 2,400 people. Its 200 agile project teams, generally with academic partners, involve more than 3,000 scientists in meeting the challenges of computer science and mathematics, often at the interface of other disciplines.
Inria works with many companies and has assisted in the creation of over 160 startups.
It strives to meet the challenges of the digital transformation of science, society and the economy.

Contexte et atouts du poste

This PhD position is framed under the EU H2020 ICT 25 TACTILITY project. Tactility aims at creating a new generation of smart electrotactile systems able to adapt to the user, application scenarios, and use conditions. Such electrotactile interfaces will provide high-density stimulation for delivering natural-like sensations. The ability to generate localized tactile feedback will change the way we interact with virtual reality content. Users will be able to feel the physical properties of virtual objects (e.g., roughness, stiffness) supporting a wide variety of natural interactions and information retrieval. Such technology will allow the design of algorithms for real-time rendering of high-fidelity electrotactile stimuli to the user. One of the main hypothesis of Tactility is that it is possible to improve the feeling of immersion and embodiment by leveraging a multimodal approach, i.e., by integrating electrotactile stimuli with visual and auditory information. TACTILITY is based on a highly interdisciplinary approach. Experts from fields such as computer science, electrical/electronic engineering, psychology and neuroscience are involved.

The PhD candidate will join the Inria’s Hybrid team (https://team.inria.fr/hybrid), internationally recognized in the virtual reality and haptic research fields. Currently, the team is composed by more than 30 members working in topics related to virtual reality, augmented reality, physical simulation, haptics and human computer interaction.

Mission confiée

Research in haptics has been notably increasing in the last years, with the objective to bring wearable haptic systems to the public, provide high-fidelity feedback and natural like sensations has the potential to revolutionise VR industry. For example, Microsoft and Facebook have underwent a notable research effort in the last years in that direction, with numerous research in wearable systems [1] and perceptual studies [2].

From existing haptic devices, tactile displays are the best placed candidates to achieve this goal. Tactile displays provide feedback to the user by stimulating the skin mechanically (e.g., vibration motors) or electrically to simulate physical properties or to convey information. For example, they are commonly used as feedback interfaces in virtual reality applications [3, 4], teleoperation [5], as well as in prosthetics, to provide sensory information from the missing limb [6].  Although a wide range of tactile display systems exist, such as ultrasound [7], air streams [8], and pin-matrix [9], they are either too complex to scale to large workspaces, or can render just basic information (e.g. notifications) [10].

In contrast, electrotactile displays can provide tactile feedback with high resolution and/or communicate multiple variables simultaneously [11]. Electrotactile displays deliver low-intensity electrical current to the skin in order to activate cutaneous nerve fibers and elicit tactile sensations. Electrotactile interfaces are simple structure, low-power consumption and low cost, since there are no moving mechanical elements. Furthermore, they can integrate a large number of tactile electrodes and allow independent modulation of stimulation parameters (e.g., location, intensity and frequency).

Principales activités

The main research objective would be the creation of a new generation of “Tactile” User Interfaces (TUIs) leveraging high-density electrotactile feedback. While the main usages of tactile feedback are targeted to the enhancement of dexterous interaction (e.g. grasping virtual objects), other promising usages are envisioned for the enhancement of other virtual reality tasks, such as object selection, indirect manipulation, virtual navigation or application control tasks. Current interaction techniques mainly rely on visual information in order to drive the perception-action loop. By introducing tactile feedback, we aim to enrich the information exchange between the virtual environment and the user in order to increase user’s awareness on the interaction state. Furthermore, the ability to render tactile feedback, will enable “blind” interactions as the user would be able to interact without directly looking the interface.

References

[1] Perception & Engineering researchers: learning how to work together to build hand-based wearable haptic devices. IEEE World Haptics 2019 Workshop. https://research.fb.com/programs/world-haptics-workshop-2019/

[2] Berger, C. C., Gonzalez Franco, M., Ofek, E., & Hinckley, K. (2018). The uncanny valley of haptics. Science Robotics, 3(17), Art-No.

 [3] K. Kilteni, A. Maselli, K. Kording and M. Slater, “Over my fake body: body ownership illusions for studying the multisensory basis of own-body perception,” Frontiers in human neuroscience, vol. 9, p. 141, 2015.

[4] B. Serrano, R. Baños and C. Botella, “Virtual reality and stimulation of touch and smell for inducing relaxation: A randomized controlled trial,” Computers in Human Behavior, vol. 55, pp. 1-8, 2016.

[5] C. Pacchierotti, D. Prattichizzo and K. Kuchenbecker, “Cutaneous feedback of fingertip deformation and vibration for palpation in robotic surgery,” IEEE Transactions on Biomedical Engineering, vol. 63, no. 2, pp. 278-287, 2016.

[6] S. Dosen, M. Markovic, M. Štrbac, M. Belić, V. Kojić, G. Bijelić, T. Keller and D. Farina, “Multichannel electrotactile feedback with spatial and mixed coding for closed-loop control of grasping force in hand prostheses,” IEEE Transactions on Neural Systems and Rehabilitation Engineering, vol. 25, no. 3, pp. 183-195, 2017.

[7] T. Carter, S. Seah, B. Long, B. Drinkwater and S. Subramanian, “UltraHaptics: multi-point mid-air haptic feedback for touch surfaces,” in Proceedings of the 26th annual ACM symposium on User interface software and technology, 2013.

[8] R. Sodhi, I. Poupyrev, M. Glisson and A. Israr, “AIREAL: interactive tactile experiences in free air,” ACM Transactions on Graphics (TOG), vol. 32, no. 4, p. 134, 2013.

[9] M. Shimojo, M. Shinohara and Y. Fukui, “Human shape recognition performance for 3D tactile display,” IEEE Transactions on Systems, Man, and Cybernetics-Part A: Systems and Humans, vol. 29, no. 6, pp. 637-644, 1999

[10] L. A. Jones and N. B. Sarter, “Tactile displays: Guidance for their design and application,” Human factors, vol. 50, no. 1, pp. 90-111, 2008.

[11] J. Hummel, J. Dodiya, L. Eckardt, R. Wolff, A. Gerndt, T. W. Kuhlen. A lightweight electrotactile feedback device for grasp improvement in immersive virtual environments. In 2016 IEEE Virtual Reality (VR) (pp. 39-48). 2016.

Compétences

The candidate must have a master degree (or equivalent), with a preference in virtual reality or computer graphics. In addition, the candidate should be comfortable with as much following items as possible:

  • Master on human computer interaction or equivalent.
  • Experience in 3D/VR applications (e.g. Unity3D).
  • Experience in evaluation methods and controlled users studies.
  • Good knowledge in programming languages.
  • Good spoken and written English.
  • Good communication skills. This PhD is framed under a larger project, thus the candidate would have to interact with other members of the project and assist to the project meetings.

Avantages

  • Subsidized meals
  • Partial reimbursement of public transport costs

Rémunération

Monthly gross salary amounting to 1 982 euros for the first and second years and 2 085 euros for the third year