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检索条件"主题词=Human-centered computing"

共 2020 条记录，以下是1851-1860 订阅

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Supporting Driver Situation Awareness for Autonomous Urban Driving with an Augmented-Reality Windshield Display 17

Supporting Driver Situation Awareness for Autonomous Urban D...

引用

17th IEEE International Symposium on Mixed and Augmented Reality (ISMAR)

作者： Lindemann, Patrick Lee, Tae-Young Rigoll, Gerhard Tech Univ Munich Chair Human Machine Commun Munich Germany

ISBN: (纸本)9781538675922

Urban traffic environments can create unpredictable hazardous situations. Even future, highly reliable automated cars (ACs) could be forced to execute sudden, surprising maneuvers causing driver discomfort and possibly a loss of trust. A counter measure might be to support driver situation awareness (SA) in such scenarios. We simulated an explanatory windshield display (WSD) interface for ACs to increase driver SA in a mixed-reality driving simulation. The interface combines screen-fixed elements and world-registered augmented reality (AR) overlays. We conducted a user study to evaluate the interface in which participants encountered critical urban driving situations and answered SA test questions during on-line freeze probes. We found a significant improvement of driver SA with the WSD interface in clear weather conditions (medium effect) as well as in bad visibility conditions (large effect).

关键词： human-centered computing human computer interaction (HCI) Interaction paradigms-Mixed / augmented reality human-centered computing Interaction design

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Wearable Haptic Device that Presents the Haptics Sensation Corresponding to Three Fingers on the Forearm 31

Wearable Haptic Device that Presents the Haptics Sensation C...

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31st Annual ACM Symposium on User Interface Software and Technology (UIST)

作者： Moriyama, Taha Nakamura, Takuto Kajimoto, Hiroyuki Univ Electrocommun Tokyo Japan

ISBN: (纸本)9781450359498

In this demo, as an attempt of a new haptic presentation method for objects in virtual reality (VR) environment, we developed a device that presents the haptic sensation of the fingertip on the forearm, not on the fingertip. This device adopts a five-bar linkage mechanism and it is possible to present the strength, direction of force. Compared with a fingertip mounted type displays, it is possible to address the issues of their weight and size which hinder the free movement of fingers. The experiences in the VR environment improved compared with without haptics cues situation regardless of without presenting haptics information directly to the fingertip. In this demo, we extended the method to three fingertips (thumb, index finger and middle finger) and three locations on the forearm using a five-bar linkage mechanism.

关键词： human-centered computing Haptic devices

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Toward Intuitive 3D User Interfaces for Climbing, Flying and Stacking 25

Toward Intuitive 3D User Interfaces for Climbing, Flying and...

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25th IEEE Conference on Virtual Reality and 3D User Interfaces (IEEE VR)

作者： Bernardin, Antonin Cortes, Guillaume Fribourg, Rebecca Luong, Tiffany Nouviale, Florian Si-Mohammed, Hakim Univ Rennes CNRS INRIA IRISA Rennes France Realyz Louverne France

ISBN: (纸本)9781538633656

In this paper, we propose 3D user interfaces (3DUI) that are adapted to specific Virtual Reality (VR) tasks: climbing a ladder using a puppet metaphor, piloting a drone thanks to a 3D virtual compass and stacking 3D objects with physics-based manipulation and time control. These metaphors have been designed to provide the user with an intuitive, playful and efficient way to perform each task.

关键词： human-centered computing human computer interaction (HCI) Interaction paradigms Virtual reality

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Geometry Extraction for Ad Hoc Redirected Walking Using a SLAM Device 5th

Geometry Extraction for Ad Hoc Redirected Walking Using a SL...

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5th International Conference on Augmented Reality, Virtual Reality, and Computer Graphics (SALENTO AVR)

作者： Hirt, Christian Zank, Markus Kunz, Andreas Swiss Fed Inst Technol Innovat Ctr Virtual Real CH-8092 Zurich Switzerland

ISBN: (纸本)9783319952703;9783319952697

Redirected walking applications allow a user to explore large virtual environments in a smaller physical space by employing so-called redirection techniques. To further improve the immersion of a virtual experience, path planning algorithms were developed which choose redirection techniques based on the current position and orientation of the user. Furthermore, additional algorithms were developed to guarantee the user's safety at all times. In order to ensure a reliable performance, both safety and planning algorithms depend on accurate position tracking which is commonly provided by an external tracking system. The disadvantage of this kind of tracking is the time-consuming preparation of the physical environment, which renders the system immobile. A possible solution to eliminate this dependency is to replace the external tracking system with a state-of-the-art inside-out tracker based on the concept of Simultaneous Localization and Mapping (SLAM). SLAM algorithms track the position and orientation of a sensor by fusing various measurements and using a continuously generated and expanding map of its surroundings. However, the information contained in this map is not suitable for existing safety and planning algorithms due to its feature-based localization properties. In this paper, we present an approach in which we attach a commercially available SLAM device to a head-mounted display to track the head motion of a user. From sensor recordings of the device, we extract environmental information specifically suitable for existing path planner and safety algorithms of a redirected walking application using a sequence of algorithms. Accordingly, the resulting spatial data consists of 2D coordinates describing closed polygons which are used to approximate the geometry of the walkable area. This geometrical data can then be streamed to the redirected walking application.

关键词： human-centered computing Virtual reality computing methodologies Tracking

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3D Touch-and-drag: Gesture-free 3D Manipulation with Finger Tracking 25

3D Touch-and-drag: Gesture-free 3D Manipulation with Finger ...

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25th IEEE Conference on Virtual Reality and 3D User Interfaces (IEEE VR)

作者： Jung, Thomas Bauer, Patrick HTW Berlin Berlin Germany

ISBN: (纸本)9781538633656

In this study, we define a new modeling technique called 3D touchand-drag, wherein users select vertices by simply approaching them with a 3D cursor such as a forefinger. Operations are finished by removing the 3D cursor from a line or plane in 3D space. These lines or planes constrain the modeling operations, as is the case when using 3D widgets. User tests demonstrated that there was no significant difference in movement time between moving a sphere along a line using a pinch gesture and using the proposed technique. Since it is easier to select a vertex by just approaching it, compared with performing a pinch gesture, we believe that 3D touch-and-drag is more efficient than current techniques, while being just as precise.

关键词： human-centered computing Gestural Input

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Using EEG to Decode Subjective Levels of Emotional Arousal during an Immersive VR Roller Coaster Ride 25

Using EEG to Decode Subjective Levels of Emotional Arousal d...

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25th IEEE Conference on Virtual Reality and 3D User Interfaces (IEEE VR)

作者： Klotzsche, F. Mariola, A. Hofmann, S. Nikulin, V. V. Villringer, A. Gaebler, M. MPI Hum Cog & Brain Sci Leipzig Germany Berlin Sch Mind & Brain Berlin Germany Sussex Neurosci Brighton E Sussex England Amsterdam Brain & Cogn Amsterdam Netherlands

ISBN: (纸本)9781538633656

Emotional arousal is a key component of a user's experience in immersive virtual reality (VR). Subjective and highly dynamic in nature, emotional arousal involves the whole body and particularly the brain. However, it has been difficult to relate subjective emotional arousal to an objective, neurophysiological marker-especially in naturalistic settings. We tested the association between continuously changing states of emotional arousal and oscillatory power in the brain during a VR roller coaster experience. We used novel spatial filtering approaches to predict self-reported emotional arousal from the electroencephalogram (EEG) signal of 38 participants. Periods of high vs. low emotional arousal could be classified with accuracies significantly above chance level. Our results are consistent with prior findings regarding emotional arousal in less naturalistic settings. We demonstrate a new approach to decode states of subjective emotional arousal from continuous EEG data in an immersive VR experience.

关键词： human-centered computing human computer interaction (HCI) HCI design and evaluation methods Laboratory experiments Applied computing Life and medical sciences Consumer health

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Cognitive and Touch Performance Effects of Mismatched 3D Physical and Visual Perceptions 25

Cognitive and Touch Performance Effects of Mismatched 3D Phy...

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25th IEEE Conference on Virtual Reality and 3D User Interfaces (IEEE VR)

作者： Hochreiter, Jason Daher, Salam Bruder, Gerd Welch, Greg Univ Cent Florida Orlando FL 32816 USA

ISBN: (纸本)9781538633656

While research in the field of augmented reality (AR) has produced many innovative human-computer interaction techniques, some may produce physical and visual perceptions with unforeseen negative impacts on user performance. In a controlled human-subject study we investigated the effects of mismatched physical and visual perception on cognitive load and performance in an AR touching task by varying the physical fidelity (matching vs. non-matching physical shape) and visual mechanism (projector-based vs. HMD-based AR) of the representation. Participants touched visual targets on four corresponding physical-visual representations of a human head. We evaluated their performance in terms of touch accuracy, response time, and a cognitive load task requiring target size estimations during a concurrent (secondary) counting task. After each condition, participants completed questionnaires concerning mental, physical, and temporal demands;stress;frustration;and usability. Results indicated higher performance, lower cognitive load, and increased usability when participants touched a matching physical head-shaped surface and when visuals were provided by a projector from underneath.

关键词： human-centered computing human computer interaction (HCI) HCI design and evaluation methods User studies human-centered computing human computer interaction (HCI) Interaction paradigms Mixed/augmented reality human-centered computing human computer interaction (HCI) Interaction techniques

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Speaker Hand-Offs in Collaborative human-Agent Oral Presentations 18

Speaker Hand-Offs in Collaborative Human-Agent Oral Presenta...

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18th ACM International Conference on Intelligent Virtual Agents (IVA)

作者： Murali, Prasanth Ring, Lazlo Ha Trinh Asadi, Reza Bickmore, Timothy Northeastern Univ Boston MA 02115 USA

ISBN: (纸本)9781450360135

Prior studies of public speaking behavior have demonstrated that public speaking anxiety monotonically decreases with the number of co-presenters giving an oral presentation and increases with the size of the audience. However, speaker "hand off" behavior-the verbal and nonverbal cues used to transition from one speaker to another-and its effect on speaker anxiety and presentation quality has not been systematically studied. In this work we report on two empirical studies of speaker hand-off behavior used during human co-presentations. We find that the cues used for hand-offs during prepared and rehearsed presentations differ significantly from the cues observed in face-to-face conversational turn-taking. We describe two systems that leverage automatic recognition of these verbal and nonverbal cues to drive hand-offs during co-presentations with a life-sized virtual agent.

关键词： human-centered computing Natural language interfaces Turn-taking

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Effects of Image Size and Structural Complexity on Time and Precision of Hand Movements in Head Mounted Virtual Reality 25

Effects of Image Size and Structural Complexity on Time and ...

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25th IEEE Conference on Virtual Reality and 3D User Interfaces (IEEE VR)

作者： Batmaz, Anil Ufuk de Mathelin, Michel Dresp-Langley, Birgitta Univ Strasbourg CNRS UMR 7357 ICube Lab Strasbourg France

ISBN: (纸本)9781538633656

The effective design of virtual reality (VR) simulators requires a deeper understanding of VR mediated human actions such as hand movements, with specifically tailored experiments testing how different design parameters affect performance. The present experiment investigates the time and precision of hand (index finger) movements under varying conditions of structural complexity and image size in VR without tactile feed-back from object to hand/finger. 18 right-handed subjects followed a complex and a simple physiological structure of small, medium and large size in VR, with the index finger of one of their two hands, from right to left, and from left to right. The results show that subjects performed best with small-size-simple structures and large-size-complex structures in VR. Movement execution was generally faster and more precise on simple structures. Performance was less precise when the dominant hand was used to follow the complex structures and small object size in VR. It is concluded that both size and structural complexity critically influence task execution in VR when no tactile feed-back from object to finger is generated. Individual learning curves should be monitored from the beginning of the training as suggested by the individual speed-precision analyses.

关键词： computing methodologies Computer Graphics Graphic systems and interfaces Virtual reality human-centered computing human computer interaction (HCI) Interaction paradigms Virtual reality human-centered computing human computer interaction (HCI) Interaction devices human-centered computing Interaction design Software and its engineering Software organization and properties Virtual worlds software Virtual worlds training simulations

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RST 3D: A Comprehensive Gesture Set for Multitouch 3D Navigation 25

RST 3D: A Comprehensive Gesture Set for Multitouch 3D Naviga...

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25th IEEE Conference on Virtual Reality and 3D User Interfaces (IEEE VR)

作者： Kulik, Alexander Kunert, Andre Keil, Magdalena Froehlich, Bernd Bauhaus Univ Weimar Virtual Real & Visualizat Res Grp Weimar Germany

ISBN: (纸本)9781538633656

We present a comprehensive multitouch input mapping for 3D navigation of multiscale 3D models. In contrast to prior work, our technique offers explicit control over 3D rotation, 3D translation, and uniform scaling with manipulative gestures that do not require graphical widgets. Our proposed technique is consistent with the established RST mapping (rotation, scaling, translation) for 2D multitouch input and follows suggestions from prior work on multitouch 3D interaction. Our implementation includes a rendering technique that can reduce perceptual conflicts of 3D touch input on stereoscopic displays. We also report on two user studies that informed the suggested interaction design and confirmed its usability.

关键词： human-centered computing human computer interaction nteraction techniques Gestural input

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