Real-time lip tracking for virtual lip implementation in virtual environments and computer games

2002 ◽  
Author(s):  
Zhang Jian ◽  
M.N. Kaynak ◽  
A.D. Cheok ◽  
Ko Chi Chung
Keyword(s):  
Virtual Environments ◽  
Real Time ◽  
Computer Games ◽  
Lip Tracking

AN IMPROVED VIEW FRUSTUM CULLING METHOD USING OCTREES FOR 3D REAL-TIME RENDERING

2013 ◽  
Vol 13 (03) ◽  
pp. 1350009
Author(s):  
PAULO ROBERTO DE CARVALHO ◽  
MAIKON CISMOSKI DOS SANTOS ◽  
WILLIAM ROBSON SCHWARTZ ◽  
HELIO PEDRINI
Keyword(s):  
Virtual Reality ◽  
Virtual Environments ◽  
Real Time ◽  
Computer Games ◽  
Frame Rate ◽  
Visual Simulation ◽  
3D Graphics ◽  
Spatial Partitioning ◽  
Terrain Visualization ◽  
View Frustum Culling

The generation of real-time 3D graphics scenes normally demands high computational requirements. Several applications can benefit from efficient algorithms for rendering complex virtual environments, such as computer games, terrain visualization, virtual reality and visual simulation. This paper describes an improved view frustum culling method using spatial partitioning based on octrees for 3D real-time rendering. The proposed method is compared against two other approaches. Experiments using four different scenes are conducted to evaluate the performance of each tested method. Results demonstrate that the proposed method presents superior frame rate for all scenes.

Development of environment design support mixed reality system capable of environment estimation using deep learning

Impact ◽  
2020 ◽  
Vol 2020 (2) ◽  
pp. 9-11
Author(s):  
Tomohiro Fukuda
Keyword(s):  
Deep Learning ◽  
Real Time ◽  
Computer Games ◽  
Construction Projects ◽  
Mixed Reality ◽  
Semantic Segmentation ◽  
Environment Design ◽  
Aviation Training ◽  
Architecture And Design ◽  
World Environment

Mixed reality (MR) is rapidly becoming a vital tool, not just in gaming, but also in education, medicine, construction and environmental management. The term refers to systems in which computer-generated content is superimposed over objects in a real-world environment across one or more sensory modalities. Although most of us have heard of the use of MR in computer games, it also has applications in military and aviation training, as well as tourism, healthcare and more. In addition, it has the potential for use in architecture and design, where buildings can be superimposed in existing locations to render 3D generations of plans. However, one major challenge that remains in MR development is the issue of real-time occlusion. This refers to hiding 3D virtual objects behind real articles. Dr Tomohiro Fukuda, who is based at the Division of Sustainable Energy and Environmental Engineering, Graduate School of Engineering at Osaka University in Japan, is an expert in this field. Researchers, led by Dr Tomohiro Fukuda, are tackling the issue of occlusion in MR. They are currently developing a MR system that realises real-time occlusion by harnessing deep learning to achieve an outdoor landscape design simulation using a semantic segmentation technique. This methodology can be used to automatically estimate the visual environment prior to and after construction projects.

On the Performance Comparisons of Native and Clientless Real-Time Screen-Sharing Technologies

2021 ◽  
Vol 17 (2) ◽  
pp. 1-26
Author(s):  
Chun-ying Huang ◽  
Yun-chen Cheng ◽  
Guan-zhang Huang ◽  
Ching-ling Fan ◽  
Cheng-hsin Hsu
Keyword(s):  
Real Time ◽  
Computer Games ◽  
Performance Metrics ◽  
Video Quality ◽  
Dynamic Network ◽  
Web Browsers ◽  
Depth Analysis ◽  
Measurement Methodology ◽  
Overall Performance ◽  
Screen Sharing

Real-time screen-sharing provides users with ubiquitous access to remote applications, such as computer games, movie players, and desktop applications (apps), anywhere and anytime. In this article, we study the performance of different screen-sharing technologies, which can be classified into native and clientless ones. The native ones dictate that users install special-purpose software, while the clientless ones directly run in web browsers. In particular, we conduct extensive experiments in three steps. First, we identify a suite of the most representative native and clientless screen-sharing technologies. Second, we propose a systematic measurement methodology for comparing screen-sharing technologies under diverse and dynamic network conditions using different performance metrics. Last, we conduct extensive experiments and perform in-depth analysis to quantify the performance gap between clientless and native screen-sharing technologies. We found that our WebRTC-based implementation achieves the best overall performance. More precisely, it consumes a maximum of 3 Mbps bandwidth while reaching a high decoding ratio and delivering good video quality. Moreover, it leads to a steadily high decoding ratio and video quality under dynamic network conditions. By presenting the very first rigorous comparisons of the native and clientless screen-sharing technologies, this article will stimulate more exciting studies on the emerging clientless screen-sharing technologies.

scholarly journals Dynamic Difficulty Adjustment (DDA) in Computer Games: A Review

2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Mohammad Zohaib
Keyword(s):  
Learning Curve ◽  
Real Time ◽  
Computer Games ◽  
Negative Experience ◽  
Level Of Difficulty

Dynamic difficulty adjustment (DDA) is a method of automatically modifying a game’s features, behaviors, and scenarios in real-time, depending on the player’s skill, so that the player, when the game is very simple, does not feel bored or frustrated, when it is very difficult. The intent of the DDA is to keep the player engrossed till the end and to provide him/her with a challenging experience. In traditional games, difficulty levels increase linearly or stepwise during the course of the game. The features such as frequency, starting levels, or rates can be set only at the beginning of the game by choosing a level of difficulty. This can, however, result in a negative experience for players as they try to map a predecided learning curve. DDA attempts to solve this problem by presenting a customized solution for the gamers. This paper provides a review of the current approaches to DDA.

scholarly journals Some Remarks on Ontological-Cognitive Structures in the Metaverse

2010 ◽  
Vol 2 (5) ◽  
Author(s):  
Luis Carlos Petry
Keyword(s):  
Virtual Environments ◽  
Real Time ◽  
Virtual Worlds ◽  
Cognitive Structures ◽  
Genetic Epistemology ◽  
Virtual Experiments ◽  
Philosophical Basis ◽  
Physical Experiments ◽  
Physical Interfaces

Abstract: This paper aims to bring forth some ontological elements that we believe are fundamental to a wider philosophical basis of the Metaverses. We start from some indications presented by physical experiments which reproduce virtual environments in real time, searching for its eidetic-methodological relations with genetic epistemology and construtivism, showing that the structures of physical interfaces, which are founded in virtual experiments, dialogging with the concepts of body, mind, projection, cognition, and other concepts, which are present in the possible formulation of an ontology of the virtual worlds and the Metaverses. We conclude the paper with the idea of the necessity to think the issue of the ontological fundamentation of cyberspace and its metaverses.

Designing Multiplayer Online Games Using the Real-Time Framework

2012 ◽  
pp. 290-321 ◽  
Author(s):  
Sergei Gorlatch ◽  
Frank Glinka ◽  
Alexander Ploss ◽  
Dominik Meiländer
Keyword(s):  
Real Time ◽  
Computer Games ◽  
Wide Spectrum ◽  
Online Games ◽  
Special Focus ◽  
Single Server ◽  
Multiplayer Online Games ◽  
Multiple Servers ◽  
Game State ◽  
And Migration

This chapter describes a novel, high-level approach to designing and executing online computer games. The approach is based on our Real-Time Framework (RTF) and suits a wide spectrum of online games including Massively Multiplayer Online Games (MMOG) and First-Person Shooters (FPS). The authors address major design issues like data structures and Area of Interest (AoI), with a special focus on the scalability of games implemented on multiple servers, including distribution of the game state, inter-server communication, object serialization and migration, etc. The chapter illustrates the approach with two case studies: the design of a new multi-player online game and bringing the single-server commercial game Quake 3 to multiple servers in order to increase the number of simultaneous players. The authors show the place of their approach in the taxonomy of game development approaches, and they report experimental results on the performance of games developed using RTF.

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