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Detalhes

Detalhes

  • Nome

    Guilherme Santos Gonçalves
  • Cluster

    Informática
  • Cargo

    Assistente de Investigação
  • Desde

    01 outubro 2016
001
Publicações

2021

Hands-free interaction in immersive virtual reality: A systematic review

Autores
Monteiro, P; Goncalves, G; Coelho, H; Melo, M; Bessa, M;

Publicação
IEEE Transactions on Visualization and Computer Graphics

Abstract

2021

GestOnHMD: Enabling Gesture-based Interaction on Low-cost VR Head-Mounted Display

Autores
Monteiro, P; Goncalves, G; Coelho, H; Melo, M; Bessa, M;

Publicação
IEEE TRANSACTIONS ON VISUALIZATION AND COMPUTER GRAPHICS

Abstract
Low-cost virtual-reality (VR) head-mounted displays (HMDs) with the integration of smartphones have brought the immersive VR to the masses, and increased the ubiquity of VR. However, these systems are often limited by their poor interactivity. In this paper, we present GestOnHMD, a gesture-based interaction technique and a gesture-classification pipeline that leverages the stereo microphones in a commodity smartphone to detect the tapping and the scratching gestures on the front, the left, and the right surfaces on a mobile VR headset. Taking the Google Cardboard as our focused headset, we first conducted a gesture-elicitation study to generate 150 user-defined gestures with 50 on each surface. We then selected 15, 9, and 9 gestures for the front, the left, and the right surfaces respectively based on user preferences and signal detectability. We constructed a data set containing the acoustic signals of 18 users performing these on-surface gestures, and trained the deep-learning classification pipeline for gesture detection and recognition. Lastly, with the real-time demonstration of GestOnHMD, we conducted a series of online participatory-design sessions to collect a set of user-defined gesture-referent mappings that could potentially benefit from GestOnHMD.

2020

A Comparative Study Between Wired and Wireless Virtual Reality Setups

Autores
Goncalves, G; Monteiro, P; Melo, M; Vasconcelos Raposo, J; Bessa, M;

Publicação
IEEE Access

Abstract

2020

Impact of different sensory stimuli on presence in credible virtual environments

Autores
Goncalves, G; Melo, M; Vasconcelos Raposo, J; Bessa, M;

Publicação
IEEE Transactions on Visualization and Computer Graphics

Abstract

2020

A novel method to enhance the touristic 360° promotional video experience

Autores
Goncalves, G; Melo, M; Vasconcelos Raposo, J; Bessa, M;

Publicação
Multimedia Tools and Applications

Abstract
Promotional 360° videos are now widely used to promote touristic sites, giving consumers a more immersive glimpse of what they can expect from those places. However, these 360° videos often comprise so much information that it overloads the users, not allowing them to benefit from such a rich multimedia experience. To overcome this issue, we propose and evaluate a novel method that allows the experience of immersive 360° promotional videos to be more interactive and informative without overloading users. The evaluation study focuses on how the proposed interaction method performs versus the non-interactive method in terms of user satisfaction, presence, and cybersickness in both a low-immersive (computer monitor) setup and an immersive platform (head-mounted display (HMD)). Our sample (N = 50) was randomly divided into four groups: 360° (computer monitor without interaction), 360°Interaction (computer monitor with interaction), IVR360° (HMD without interaction) and IVR360°Interaction (HMD with interaction). The results show that the novel proposed method is preferred by users over the non-interactive approach regardless of the setup (low-immersive or immersive). For cybersickness, there were no differences across all the experimental scenarios. We conclude that our method has the potential to bring added value to touristic promotion when compared to conventional promotional approaches. © 2020, Springer Science+Business Media, LLC, part of Springer Nature.