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Visual tracking plays a fundamental role in many applications, such as video surveillance, image compression and three-dimensional reconstruction. From the perspective of accuracy and complexity, correlation filter for target tracking has been proved to be one of the most efficient algorithms. However, it suffers from some difficulties when tracking complex objects with rotations, occlusions and other...
This work addresses the creation of a development framework where application developers can create, in a natural way, im-mersive physical activities where users experience a 3D first-person perception of full body control. The proposed frame-work is based on commercial motion sensors and a Head-Mounted Display (HMD), and a uses Unity 3D as a unifying environment where user pose, virtual scene and...
3D printing has become an important and prevalent tool. Image-based modeling is a popular way to acquire 3D models for further editing and printing. However, exiting tools are often not robust enough for users to obtain the 3D models they want. The constructed models are often incomplete, disjoint and noisy. This paper proposes a robust automatic method for segmenting an object out of the background...
Recently there are various researches on educations using augmented reality and learners can enhance learning effects by interest and immersion via direct and indirect experience learning they can touch, catch, and feel by using five senses such as vision, auditory sense, sense of touch, and etc. This paper designs the block puzzle education system based on augmented reality to educate creativity,...
RGB-D cameras can provide rich 2D visual and 3D point cloud information simultaneously, which are well suited to estimate ego-motion. This paper proposes a robust and accurate visual odometry method by fusing inertial measurement unit(IMU) sensor data: we use GPU-based SIFT features for online odometry estimation and improve its stability by fusing IMU data. The pose of each RGB-D frame is applied...
In the last three decades with the Information Technologies advent and the growth of the concept of Virtual Environments, a set of new ways to perform tasks have emerged, in the most diversified areas of society. The main focus of this work was to verify if it was possible to increase the sense of presence through multi-sensory stimulation, creating a virtual environment of simulation that causes...
The propose of this study aims to use eyeball model approach and algebra-geometric to analyze 3-D gaze estimation. Which stereo gaze directions calculate from 3-D coordinates of the value of Cornea Center and Pupil Center of left and right eyes. Then stereo gaze directions are used to get point of gaze (POG) of 3-D coordination. The experimental is designed in three conditions, (i) no head movement...
The main objective of this paper is to explain an indoor positioning system and 3D visualization using mobile technologies and virtual reality methods. With our proposal we aim to improve the comprehension of historical World Heritage buildings by using advanced visual technologies during the visit as for example wearable devices. We will design a mixed method to assess them and the user's experience,...
Traditional building system generate high volumes of waste, the final disposal of these wastes is a latent, high-impact problem environment. The development and implementation of information systems in order to guide construction processes and reduce the volumes of waste material is a felt need today. In order to challenge traditional methodologies used in building systems and promoting technological...
In soccer matches, 3D reconstruction is a main part of many applications including free-viewpoint broadcasting, match analysis, augmented reality, and refereeing examination. The main challenge of 3D reconstruction in soccer scenes is the human body reconstruction. Although 3D reconstruction methods have been improved to a high extent in controlled condition, still there are lots of uncovered issues...
Task of 3D scene generation has been focused in many systems but without processing its input query. Such system automatically generates 3D equivalent of text input by identifying explicit and implicit constraints. However, if input query is refined, generation of more relevant scene will be easy. Our proposed system takes raw text as input identifies misspelled, incomplete and non visualizable words...
In this paper, we formulate 3D model recognition as a statistical inference problem using a Pitman-Yor process mixture of Beta-Liouville Distributions. The proposed model is learned via a collapsed variational inference approach. Unlike classic variational Bayes, the collapsed approach does not make the non-realistic assumption that the model's parameters are independent from the assignment variables,...
In this paper 2/3-D device simulation is presented as a highly useful and effective tool in microelectronics education for the analysis and characterization of electrothermal behavior of semiconductor structures and devices, standing alone and/or coupled in integrated circuits. Authors used Technology Computer Aided Design as a simulation tool in the education process at Institute of Electronics and...
A two-dimensional cellular complex is a partition of a surface into a finite number of elements—faces (open disks), edges (open arcs), and vertices (points). The topology of a cellular complex is the abstract incidence and adjacency relations among its elements. Here we describe a program that, given only the topology of a cellular complex, computes a geometric realization of the same—that is, a specific...
Large scale distributed visualizations are routinely used by organizations in both the commercial and government sectors for training and simulation. These simulations are of particular importance in the research associated with the United States Federal Aviation Administration's current work on updating the National Airspace System to the Next Generation Air Transportation System. This new system...
This paper introduces a software development kit (SDK) to provide IT developers and medical community a platform to build new simulation technologies for surgery training. There is described a formal model for simulation objects, scenes and scenarios representation and a software solution for objects interaction modeling and surgery scene simulating. The results are illustrated by the simulation suite...
With advances in virtual reality technology and its multiple applications, the need for believable, immersive virtual environments is increasing. Even though current computer graphics methods allow us to develop highly realistic virtual worlds, the main element failing to enhance presence is autonomous groups of human inhabitants. A great number of crowd simulation techniques have emerged in the last...
In this paper, we propose an innovative approach that enables two or more users to manipulate an object collaboratively. Our goal is to benefits from the wide variety of todays VR devices. Therefore, our solution is based on an asymmetric collaboration pattern at different scales in which users benefit from suited points of views and interaction techniques according to their device setups. Indeed,...
Here we explore a visual display technique for low frame rate virtual environments called low persistence (LP). This involves displaying the rendered frame for a single display frame and blanking the screen while waiting for the next frame to be generated. To gain greater knowledge about the LP technique, we have conducted a user study to evaluate user performance and learning during a dynamic target...
Vection is the illusion of self-motion, usually induced by a visual stimulus. It is important in virtual reality because inducing it in motion simulations can lead to improved experiences. We examine linear and circular vection in commodity level head-mounted displays. We compare the experience of circular vection induced through a real world stimulus, an optokinetic drum, with that experienced through...
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