American Sign Language (ASL) is the primary language used by the North American Deaf Community. We present our method for producing natural animations of fingerspelling, a functionally important subset of ASL. User testing demonstrates that our animations are readily identified by...

This paper presents a novel Monte Carlo strategy for solving the global ilumination problem. The unusual Monte Carlo approach is different from the one, which is utilized widely in prevalent global illumination algorithms at present, and breaks a new Monte Carlo path for settling&#...

Projector-based display systems have been used in computer graphics for about as long as the field has existed. While projector-based systems have many advantages, a significant disadvantage is the need to obtain and then adhere to an accurate analytical model of the mechani...

We present strategies for parallelising ray tracing based on 5D adaptive subdivision. Our goals are to obtain good speed-up and to efficiently balance the load between the processors while minimising the required memory per processor inherently large in 5D subdivision. First, loo...

This algorithm draws ellipses with integer centres and decimal radii on discrete devices using fixed-point arithmetic. These ellipses have both X and Y axis parallel to the coordinate axes. It uses forward differences to diminish its cost. It has a low comp utational co...

We propose volume registration procedures based on spherical artificial markers presented in medical multimodal data sets (MRI and CT, especially). The procedures proposed are either semi-automatic or fully-automatic. A semi-automatic approach requires to label approximate locations of the sphe...

The wide availability of hardwired Z-buffer has sparked an explosion in the number of applications of the algorithm whose origins lie in hidden surface elimination. This paper presents a much-needed survey of key applications of the Z-buffer from the fields of rendering, mod...

Refinement is the part of the hierarchical radiosity algorithm that decides the best subdivision of the scene geometry to meet user goals using minimum resources. The refinement oracle is a central component of the radiosity algorithm, because it affects the computation time ...

In this article we present an algorithm to determine the intersection between rays and triangles based on the idea of the study of signs with respect to triangles. One of the advantages of this approach is its robustness due to its lack of trigonometric operations&...

This paper demonstrates that techniques in flexible body dynamics can yield surprising results when applied to rigid bodies. The discussion presents a technique for constructing rigid bodies from collections of masses and springs, and demonstrates that the simulation calculates many f...

In this paper we report on using Common Object Request Broker Architecture (CORBA) middleware as a means of supporting the rapid development of Distributed Virtual Environment (DVE) applications. We show how CORBA services can be exploited to provide many of the typical func...

Understanding the intricacies behind concurrency within object-oriented programming languages has always been a challenge for undergraduate students. This is particularly true since both are complex issues in their own rights. Visualisation, when used adequately, can be of tremendous assistance...

Digital Teletext is one of the most important interactive services of emerging digital television. As an enhanced version of existing analogue Teletext service, it’s a resident application of the set-top box. Its information will be stored in a data carousel and transmitted ...

An integrated Multimedia CAI system of Engineering Drawing is working in Guangdong University of Technology. It includes a set of multimedia software of a teaching system, exercise system, test system, management system of Engineering Drawing and a Computer Graphics instruction system...

In this paper we will be describing a new animation architecture and its implementation in our system LIVE. This model introduces a new blending layer approach which uses several motion generators on the same character at the same time. Despite the numerous studies done...

Solving the problem of locating services in a given context requires a methematical abstraction so that its complexity can be managed by means of an iterative search through context simulations. Keeping the interface between planners and the model within planners’ knowledge domai...

In order to help the user to accomplish a task, teleoperation systems have to integrate different tools such as visualization, divers interaction devices, planning tools, etc.… The interface must be able to give complete information of the real world and the user can, u...

Our university has developed a completed Multimedia CAI system of Engineering Drawing. It is available to all students of Engineering Specialties. This education software has been developed by the Department of Engineering and Computer Graphics led by Prof. Zongyi ZUO. During the...

Ray-tracing algorithm is very used to produce realistic synthetic images in Computer Graphics. Yet, the time necessary to obtain images of high quality is very high. The bottleneck of this method of visualization appears when the intersection between the rays and the differe...

We present a visualization system allowing non-programmers to visualize, explore, and analyze unknown multivariate data by designing an appropriate glyph representation with minimal user interaction. Nonetheless, our system is powerful enough to allow the user to generate a great variety&#...