We combine techniques from interactive computer graphics and automated computer vision to extract articulated body movement from video. Active contours and techniques from image processing are used to identify features and establish feature relationships from frame to frame. A threedimensional hierarchical model is associated with active contours, which then kinematically “pull” the model along...

The use of real-time 3D computer graphics in interactive entertainment has grown dramatically recently. These entertainment applications include better arcade games, 3D-capable home game consoles, more sophisticated multiplayer games for location-based entertainment (LBE) centers, virtual actors on TV driven by puppeteers with motion capture devices, and even virtual interactive theatres where ...

This chapter describes ways in which contouring and isosurfacing techniques for 3D computer graphics have evolved. In particular, we show how they are strongly intertwined and how they have moved from being non-interactive to interactive processes, making them appropriate for the kinds of dynamic representation required for geovisualization. The analysis relies upon data defined on a regular, r...

This paper addresses the issue of allowing a user more control over the outcomes of interactive evolution for computer animation, a variation on genetic algorithms. By using a point-for-point representation for genotype, the control both in selection and variation process is possible while the genotype represented by procedural rules in previous works allows it only in the selection. We experim...

This tutorial highlights some recent results on the acquisition and interactive display of high quality 3D models. For further use in photorealistic rendering or object recognition, a high quality representation must capture two different things: the shape of the model represented as a geometric description of its surface and on the other hand the appearance of the material or materials it is m...

We describe comprehensive analysis tools for human joints, such as knees, hips, and hands. The tools construct solid models of the bone geometry from computer tomography images, analyze the contacts between pairs of interacting bones, simulate the rigid body dynamics of the joint, compute the bone stresses, and visualize the results with 3D, interactive graphics. The user provides the computer ...

In this paper the experience gained at using low-cost interactive marker augmented reality (AR) technology during course Computer graphics is presented. The preliminary exploration of AR technology adoption for teaching support and learning enhancement is done and several benefits are identified, summarized and analyzed via a model. Two learning scenarios are designed based on human-computer in...

Direct interactive manipulation of 3D objects is very important in Computer Graphics. The user interface to deal with this problem poses a difficult problem because of the high number of degrees of freedom involved, associated with the loss of depth in the viewing projection. This paper introduces a new technique to specify displacement vectors in the three-dimensional space. The technique is b...