The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Unilateral spatial neglect is a neuropsychological syndrome often observed in right hemisphere stroke patients. The symptoms differ from subject to subject. A few rehabilitation approaches, e.g. prism adaptation, have demonstrated some effect in reducing the symptoms, but the underlying mechanisms are still largely unclear. Recently, neural models have been proposed to qualitatively describe cortical...
This work consists of the study of techniques of robotics and virtual reality to develop a simulator that can be used in robotics schools, having an adequate visualization and a simple and intuitive way of interaction. For this, a 3D virtual environment for robotics was developed. Virtual reality resources have been incorporated to improve the visualization and to facilitate the user interaction with...
Current state-of-the-art mesh quality measures evaluate closed and complete meshes obtained after mesh postprocessing applications, such as mesh simplification or watermarking, and compare them against the corresponding reference mesh. Emerging 3D immersive VR/AR applications use noisy 3D point cloud, typically from single RGB-D camera (such as Microsoft's Kinect) to generate standalone (no reference)...
Recent work in computer graphics has explored the synthesis of indoor spaces with furniture, accessories, and other layout items. In this work, we bridge the gap between the physical and virtual worlds: Given an input image of an interior or exterior space, and a general user specification of the desired furnishings and layout constraints, our method automatically furnishes the scene with a realistic...
This paper presents the concept of visualization of amber works in a virtual reality cave. It describes problems encountered during the acquisition, modeling and rendering of geometrical objects distinguished by heterogeneous transparency.
Natural User Interfaces and advanced displays can be combined to provide rich learning experiences. In this paper, we present the development and validation of a serious game that combines autostereoscopy and Natural User Interfaces for dental learning in higher education. The game includes two modes: neutral and real-world background. A comparative study to check different aspects was carried out...
A physical disability can highly harm the capability of a person to move. There are vehicles, like powered or manual wheelchair that can give to disabled people a part of their mobility back but this will not give them their entire mobility and autonomy. Virtual Fauteuil is a platform of simulation for wheelchair that has been developed in order to analyze issues linked to the use of a wheelchair...
A possible solution to ensure real-time interaction with virtual environments, while not visibly degrading the quality of object models is to construct selectively-densified meshes, that preserve a higher density around the regions that characterize the most the object's shape and properties. The purpose of such an approach is to aim at improving the perceived quality of the models in those areas...
Although the area of surgical simulation has been the subject of study in recent years, it is still necessary to develop artificial experimental models with a perspective to dismiss the use of biological models. Since this makes the simulators more real, transferring the environment of the health professional to a physical or virtual reality, an anesthetic prototype has been developed, where the motor...
Most of daily life's signals vary with time. Vibrations in moving vehicles or music are typical examples. Signals that are in close temporal proximity interfere with the perception of each other, which is known as temporal masking. This study evaluates the effects of temporal masking for vertical whole body vibrations (WBV). Forward vs backward masking is tested, as well as the effect of the duration...
As the number of commercial products of virtual reality (VR) has steeply increased and the development of VR technology has quickly advanced, more and more digital contents have been developed using the VR technology. This trend appears in the game industry too. The gesture-based interface becomes one of well-adopted interfaces for VR games, which has been used several years in other domains such...
Terrestrial 3D laser scanning technology has provided a new method for obtaining the spatial information of urban buildings, because of its high accuracy and contactless model, can obtain large amount of 3D coordinates point cloud data of the target. This paper describes in detail the office and field work process and key technologies of the spatial information acquisition of urban buildings using...
It is necessary for a long-range space rover to model its 3D environment in order to identify drivable roads while avoiding obstacles and hazards. We present a method of modeling a 3D environment, while identifying drivable roads and obstacles, by accumulating a sequence of point clouds from stereo. The technical issues we deal with are how to avoid error accumulation in registering point clouds using...
The preservation of the sites, monuments and other spaces, cultural heritage of the Humanity, has been one of the areas of greater use of computer graphics. This paper presents a methodology of expeditious and low-cost work aimed at virtual recreation of these historical spaces, which, through their availability on the web, allows its analysis and study by experts, as well as their access to the public,...
This article describes an intervention carried out on a 2nd Cycle of Basic Education Visual Education (VE) textbook in formal learning context, using mobile computing devices (smartphones and tablets) and Augmented Reality technology (AR). AR experiments were developed with the Aurasma Studio application and implemented with the Aurasma app. The prototypes produced were the subject of an experimental...
According to the influence of the stand spatial structure on the crown shape of Chinese fir, a new method of diversified 3D Chinese fir modeling based on spatial structure was proposed. In this study, spatial structure units that were divided by a reasonable method were selected in Chinese fir stands. And the data of spatial structure and crown shape in different units was surveyed. Two parameters...
The use of computer simulators in modern education is justified for the primary to higher school. The indispensable parts of such simulators are various devices the behavior of which has a dynamic character. Therefore, to create the most adequate computer simulator, it is necessary to develop scientific bases of virtual analogs designed of such objects and combined with the simulation methodology...
Object recognition or object's category recognition under varying conditions is one of the most astonishing capabilities of human visual system. The scientists in computer vision have been trying for decades to reproduce this ability by implementing algorithms and providing computers with appropriate tools. Hence, several intelligent systems have been proposed. To act in this field, numerous approaches...
In this paper, we present an effective and accurate gaze estimation method based on two-eye model of a subject with the tolerance of free head movement from a Kinect sensor. To accurately and efficiently determine the point of gaze, i) we employ two-eye model to improve the estimation accuracy; ii) we propose an improved convolution-based means of gradients method to localize the iris center in 3D...
Many robotics and Augmented Reality (AR) systems that use sparse keypoint-based visual maps operate in large and highly repetitive environments, where pose tracking and localization are challenging tasks. Additionally, these systems usually face further challenges, such as limited computational power, or insufficient memory for storing large maps of the entire environment. Thus, developing compact...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.