Too Hot to Handle: An Evaluation of the Effect of Thermal Visual Representation on User Grasping Interaction in Virtual Reality

Blaga, Andreea; Frutos-Pascual, Maite; Creed, Chris; Williams, Ian

doi:10.1145/3313831.3376554

Cited by 18 publications

(11 citation statements)

References 113 publications

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“…For each condition, VHs asked participants to do the survey, which was Visual effects taxonomy to be used in our experiment. We reviewed the previous AR/VR researches [4], [13], [14], [17], [18], [27]- [42] and classified color (Low, High) and form (Exaggerated, Diminished) as 2 × 2 matrices with respect to VFX's visibility.…”

Section: B Materials 1) Physical Setupmentioning

confidence: 99%

The Impacts of Visual Effects on User Perception With a Virtual Human in Augmented Reality Conflict Situations

et al. 2021

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Virtual humans (VHs) in augmented reality (AR) can provide users an illusory sense of being together in the real space. However, such an illusion can easily break when the augmented VH conflicts (or is overlaid) with the real objects. Recent spatial understanding technology is starting to make physically plausible VHs in response to collisions, but there are still limitations (e.g., resolution, accuracy) and inevitable conflict situations (e.g., unexpected passer-by), especially in daily life. Moreover, depending on the situation, VH's plausible behavior to avoid collision may rather interfere with the original interaction with the users. In this paper, we investigate three such situations: (1) when VH appears in a room through a closed door, (2) when the VH's body overlaps with static real objects, and (3) when a real moving object passes through the VH. While we considered (2) as an avoidable situation where physically plausible behaviors of VHs might be required, (1) and (3) were considered as inevitable situations (e.g., VH appearing out of nowhere, or passer-by cannot be aware of a virtual being), and we may not present VH's plausible behaviors, so alternatives might be required. Thus, for each of these notable situations in AR, we tested different visual effects as presentation methods for physical conflicts between a VH and real objects. Our findings indicate that visual effects improve VH's social/co-presence and physicality depending on the situations and effect types as well as influence users' attention/social behaviors. We discuss the implications of our findings and future research directions.INDEX TERMS Augmented reality, pervasive AR, virtual human, visual effects, perceptual issue, physicality conflict, social presence, co-presence, inevitable collision, human perception.

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Section: B Materials 1) Physical Setupmentioning

confidence: 99%

The Impacts of Visual Effects on User Perception With a Virtual Human in Augmented Reality Conflict Situations

et al. 2021

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“…Besides, Günther et al [29] designed a thermal display that provides warm and cold on-body feedback in VR through flowing liquids with different temperatures, and investigated the interdependency of visual and thermal perception in VR. Blaga et al [6] analyzed the effect of thermal visual cues on users' grasping actions without inducing actual thermal stimulus. Xu et al [96] reported a non-contact cold thermal display using a vortex tube to generate ultra-low air temperature.…”

Section: Haptic Rendering Of Abnormal Sensationmentioning

confidence: 99%

Douleur

Jiang

Chen

Fan

et al. 2021

Proc. ACM Interact. Mob. Wearable Ubiquitous Technol.

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The imitation of pain sensation in Virtual Reality is considered valuable for safety education and training but has been seldom studied. This paper presents Douleur, a wearable haptic device that renders intensity-adjustable pain sensations with chemical stimulants. Different from mechanical, thermal, or electric stimulation, chemical-induced pain is more close to burning sensations and long-lasting. Douleur consists of a microfluidic platform that precisely emits capsaicin onto the skin and a microneedling component to help the stimulant penetrate the epidermis layer to activate the trigeminal nerve efficiently. Moreover, it embeds a Peltier module to apply the heating or cooling stimulus to the affected area to adjust the level of pain on the skin. To better understand how people would react to the chemical stimulant, we conducted a first study to quantify the enhancement of the sensation by changing the capsaicin concentration, skin temperature, and time and to determine suitable capsaicin concentration levels. In the second study, we demonstrated that Douleur could render a variety of pain sensations in corresponding virtual reality applications. In sum, Douleur is the first wearable prototype that leverages a combination of capsaicin and Peltier to induce rich pain sensations and opens up a wide range of applications for safety education and more.

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“…However, these limitations can be addressed by closely analysing human actions while grasping objects in VR [69]. Accordingly, Blaga et al [8] analysed human actions while grasping virtual objects by investigating the influence of thermal visual cues on grasping in VR, to understand how virtual environments influence grasping approaches. However, this study only investigated one virtual object (the mug) and was only looking at thermal visual cues.…”

Section: Grasping Virtual Objectsmentioning

confidence: 99%

“…We built a custom experimental framework using the Oculus DK2 VR headset and the Leap Motion device. Additionally, we used a Logitech Pro 1080p HD webcam positioned on top of the Oculus DK2, based on the methodology of [8] to record participants' hand from the user's perspective at all times. The system was developed using C#, Unity 2018.2 and Leap Motion 4.0 SDK.…”

Section: Experiments 1 [E1] 31 Apparatusmentioning

confidence: 99%