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The following topics are discussed: haptic, audio and visual environments; games; multimodal perception; human-computer interaction; haptic, audio and visual sensors; collaborative distributed virtual environments and applications; and object modeling.
Despite the fact that we are capable of localizing dynamic sound sources, the mechanisms responsible for this are not completely understood since the majority of sound localization research has focused on static environments where the sound source and listener are both stationary. Although various auditory cues can provide motion information, intensity changes appear to be the dominant cue. Previous...
Visual-haptic perception of an object's compliance demands integration of haptic position and force information as well as visual position information. In this investigation the role of active exploration on visual perception as well as the influence of visual-haptic information was addressed. Participants were instructed to directly match a compliant stimulus displayed either by vision (static-passive...
We investigated the multimodal (haptic + visual) perception of heaviness of wielded objects. Virtual depictions of a wielded object moved in real time with the actual wielded object. Both apparent object size and the object's apparent responsiveness to applied muscular torques were manipulated in the virtual depictions. The findings suggest that while both object size and responsiveness contribute...
Sound/3D Sound has been accepted as a significant cue for relaying information in the field of Human-Computer Interaction, multimedia and virtual reality (VR). The paper provides significant perspectives on the potential of sound in the field of virtual environments (VEs)/virtual reality (VR), which unlike other multimedia and visualization technologies aims to completely immerse a user inside a synthetic...
Designing haptic displays is one of the main challenges in creating virtual reality systems with the sense of touch. The design of the hardware and software of haptic interfaces depends critically on the capabilities of the human haptic system. For example, force feedback interfaces, due to inherent hardware limitations such as friction and actuator saturation, present forces to users in the case...
In this paper, an objective perceptual quality metric for haptic signals is introduced. A haptic perceptually weighted peak signal-to-noise ratio (HPWNPSNR) is derived, that enhances the standard PSNR measure while incorporating haptic perceptual knowledge acquired from existing psychophysical models. Two techniques are introduced that define the haptic perceptual weighting strategy. The first relies...
This paper presents the results of a formal experiment that evaluated three viewpoint orientation techniques for desktop virtual walkthroughs. The results suggest that the use of either velocity or position control techniques for viewpoint orientation does not have a large effect on both travel time and distance for virtual walkthroughs. These results are useful for designers of desktop interactive...
Background subtraction is widely used to detect moving object from static cameras. It is usually regard as one of the most important step in applications such as traffic monitoring, human motion capture and recognition, video surveillance, etc. In order to get a good performance of the whole system, the background subtraction method could not be so time and space consuming, and the accuracy is also...
Fiducial markers and computer vision software provide a low cost and flexible way for human-computer interaction. Using the high reliability and minimal image pixel requirements of the ARTag fiducial marker system we are able to identify users and perform control actions with a simple small printed pattern. We describe two novel applications. Firstly, a user giving a presentation can control the slides...
In this paper, we present our work to extend a well known 3D graphic modeler - Blender - to support haptic modeling and rendering. The extension tool is named HAMLAT (haptic application markup language authoring tool). We describe the modifications and additions to the Blender source code which have been used to create HAMLAT. Furthermore, we present and discuss the design decisions used when developing...
The quest for an ideal floor which compensates the motions of a person walking in the virtual environment exists since the first human entered the virtual space. In this paper, an advanced model of a belt array platform, the Cyberwalk, is introduced. The prototype platform shows the increased performance of the system: High speed motion in both directions, almost unlimited upscalability of the system,...
This paper describes a new approach to solve the problem of real-time 3D hand tracking and motion analysis with a combination approach of statistical and syntactic analysis. The fundamental idea is to divide the problem into two levels according to the hierarchical property of hand gestures. The lower level of the approach implements posture detection and tracking with a statistical method based on...
We present the final evaluation of an audio-haptic editor and explorer for virtual 2D relief drawings that allow visually impaired users to create and explore graphical images. The application has been developed in collaboration with a user reference group of five blind/low vision school children, and has undergone final evaluation during spring in 2007. The AHEAD application has been used to create...
The main goal of the paper is to achieve better human communication and interaction during conversation process by using a supervising of emotional states and improving voice quality. Therefore, the proposed approach should be also very helpful in the case of vocal tract illness for monitoring of treatment process. Since haptic feedback can nowadays operate by using different sense of touch, like...
Telemanipulative microassembly is a promising research area which has attracted a great deal of attention in recent years. In these systems, precise movements and precise positioning are necessary tasks when low batches or prototypes have to be manufactured. Regarding these tasks, different teleoperator velocities might be useful. An experiment with human participants was conducted in order to find...
Many security surveillance solutions include the employment of a large number of cameras to monitor areas of interest. Despite the benefits of large-scale camera-based surveillance systems, monitoring and controlling a large number of cameras can be problematic given the vast information that must ultimately be processed. In this paper, we present a visual-based three-dimensional graphical user interface...
We present a new method of sensing the 3D visual environment and controlling objects within it. The human hand is well suited to interrogate and manipulate objects by physical contact; however, the hand is limited to surfaces within its reach. Extending the hand's innate ability, we mount miniature cameras on individual fingertips, permitting rapid sweeping through the 3D visual environment at greater...
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