Browsing Volume 12 (1993) by Title
Now showing items 1-20 of 62
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3D Computational Morphology
(Blackwell Science Ltd and the Eurographics Association, 1993)Computational Morphology is the analysis of form by computational means. This discipline typically uses techniques from Computational Geometry and Computer Aided Geometric Design. The present paper is more specifically ... -
A 4D Ray Tracing
(Blackwell Science Ltd and the Eurographics Association, 1993)We are going to present a survey of techniques using temporal coherence in between frames to render animation sequences with ray tracing. A new method using temporal coherence in the ray space (lightpath of rays) is proposed. ... -
Abstract Interaction Objects
(Blackwell Science Ltd and the Eurographics Association, 1993)The concept of an interactor has been introduced by Faconti and Paterno [6] as an abstraction of an entity in interactive graphics capable of both input and output. However the notion of interaction object need not be ... -
Accurate and Consistent Reconstruction of Illumination Functions Using Structured Sampling
(Blackwell Science Ltd and the Eurographics Association, 1993)The study of common classes of diffuse emitters, such as planar convex polygons, reveals several interesting properties of the functions of illumination these emitters cast on receiver surfaces. Some properties, such as ... -
ANIMA: An Interactive Tool for Scientific Data Animation
(Blackwell Science Ltd and the Eurographics Association, 1993)This paper describes an animation interactive system that produces image sequences used to study the numerical results of scientific simulations. The fundamental goal of the system is to provide an easy method for observing ... -
The ARGOSI Classification Scheme for Graphics and Networking Applications
(Blackwell Science Ltd and the Eurographics Association, 1993)ARGOSI is a project concerned with the relationship between standards for graphics and networking, as rejected in its full title: Applications Related Graphics and OSI Standards Integration. It is a collaborative project ... -
Automatic Reconstruction of Buildings from Stereoscopic Image Sequences
(Blackwell Science Ltd and the Eurographics Association, 1993)A vision-based 3-D scene analysis system is described that is capable to model complex real-world scenes like streets and buildings automatically from stereoscopic image pairs. Input to the system is a sequence of stereoscopic ... -
Boolean Operations and Spatial Complexity of Face Octrees.
(Blackwell Science Ltd and the Eurographics Association, 1993)Most of the existing representation schemes of free form surfaces or objects with free form boundary are not capable to compute efficiently boolean operations and other usual geometric interrogations. Classical octrees, ... -
The Cone of Normals Technique for Fast Processing of Curved Patches
(Blackwell Science Ltd and the Eurographics Association, 1993)The cone of normals technique for curved surface patches allows to perform various quick tests at the patch level such as front- or backfacing test, light influence test, and existence of silhouette edges test. For a given ... -
Cooperative Visualization of Computational Fluid Dynamics
(Blackwell Science Ltd and the Eurographics Association, 1993)Tempus Fugit/Interview is a computational fluid dynamics visualization application for which processing is distributed between high performance graphics workstations and supercomputers. Facilities are provided in the ... -
DaScript3D Integrating 3D Graphics in a Page Description Language
(Blackwell Science Ltd and the Eurographics Association, 1993)Despite the necessity of producing high-quality documents comprising all aspects of electronic publishing, there is still no system available that can generate and integrate two-dimensional (2D) graphics, three-dimensional ... -
A Declarative Design Method for 3D Scene Sketch Modeling
(Blackwell Science Ltd and the Eurographics Association, 1993)In this paper, we present a dynamic model associated with an intelligent CAD system aiming at the modeling of an architectural scene sketch. Our design methodology has been developed to simulate the process of a user who ... -
The Determination of Form-Factors by Lookup Table
(Blackwell Science Ltd and the Eurographics Association, 1993)Current methods for computer image synthesis using the radiosity algorithm rely heavily on the calculation of geometrical properties, known as form-factors, which quantify the energy exchange between pairs of surfaces in ... -
DIGIS A Graphical User Interface Design Environment for Non-Programmers
(Blackwell Science Ltd and the Eurographics Association, 1993)DIGIS (Direct Interactive Generation of Interactive Systems) is a graphical UI design environment for non-programmers that facilitates the design of all aspects of a UI with direct manipulation techniques. DIGIS is based ... -
Direct 3D Manipulation Techniques for Interactive Constraint-based Solid Modelling
(Blackwell Science Ltd and the Eurographics Association, 1993)This paper presents a novel constraint-based 3D manipulation approach to interactive constraint-based solid modelling. This approach employs a constraint recognition process to automatically recognise assembly relationships ... -
A Dynamic Gesture Language and Graphical Feedback for Interaction in a 3D User Interface
(Blackwell Science Ltd and the Eurographics Association, 1993)In user interfaces of modern systems, users get the impression of directly interacting with application objects. In 3D based user interfaces, novel input devices, like hand and force input devices, are being introduced. ... -
Electronic Kaleidoscopes for the Mind
(Blackwell Science Ltd and the Eurographics Association, 1993)The goal ofthis article is to present an informal introduction and tutorial on aestheticallypleasing kaleidoscopic images. The article is intended for the non-mathematical reader interested in computer art. Simple generating ... -
Extracting contour lines from a hierarchical surface model
(Blackwell Science Ltd and the Eurographics Association, 1993)The Hierarchical Triangulated Irregular Network (HTIN) is a structure for representing 2?-dimensional surfaces at different levels of detail through piecewise-linear approximations based on triangulations of the surface ... -
Fast Spheres
(Blackwell Science Ltd and the Eurographics Association, 1993)A new method for generating sphere-like images, using parabolic surfaces delimited by Bresenham s circle- generation algorithm, is presented. In many cases the resultant images are indistinguishable from spheres illuminated ... -
Form Factor Calculation: a New Expression with Implementations on a Parallel T.Node Computer
(Blackwell Science Ltd and the Eurographics Association, 1993)The radiosity technique uses the heat transfer theory to define a view-independent illumination model. For complex scenes, calculation of this model is very time-intensive, due largely to the determination of a geometric ...