Browsing EG1993 by Issue Date
Now showing items 21-40 of 41
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Photo-Realistic Imaging of Digital Terrains
(Blackwell Science Ltd and the Eurographics Association, 1993)We present a method for the generation of photo-realistic images of views over terrain datasets by mapping a digital aerial photograph on a perspective projection of a digital elevation map. We use high resolution for both ... -
Parallel 3D Delaunay Triangulation
(Blackwell Science Ltd and the Eurographics Association, 1993) -
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. ... -
Variational Surface Design and Surface Interrogation
(Blackwell Science Ltd and the Eurographics Association, 1993)The generation of technical smooth surfaces from a mesh of three-dimensional data points is an important problem in geometric modelling. In this publication we give a survey of some new techniques based on a calculus of ... -
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 ... -
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 ... -
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 ... -
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 ... -
Verve
(Blackwell Science Ltd and the Eurographics Association, 1993)The design principles of a hardware acceleratorfor volume rendering are described. The architecture represents a voxel subsystem which interfaces easily to any existing workstation. Host requirements are low since it ... -
Pseudo-Satellitefilm Using Fractal Clouds to Enhance Animated Weather Forecasting
(Blackwell Science Ltd and the Eurographics Association, 1993)We have developed a system enabling the National German Meteorological Office to generate pseudo-satellite images and video sequences based on their weather forecasting simulation data. With our system meteorologists can ... -
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 ... -
An Integrated System for Modeling, Animating and Rendering Hair
(Blackwell Science Ltd and the Eurographics Association, 1993)There are basically four problems to solve in order to produce realistic animated synthetic actors with hair: hair modeling and creation, hair motion, collision detection and hair rendering. This paper describes a complete ... -
Interactive Neural Network Texture Analysis and Visualization for Surface Reconstruction in Medical Imaging
(Blackwell Science Ltd and the Eurographics Association, 1993)The following paper describes a new approach for the automatic segmentation and tissue classification of anatomical objects such as brain tumors from magnetic resonance imaging (MRI) data sets using artificial neural ... -
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 ... -
A Progressive Radiosity Algorithm for Scenes Containing Curved Surfaces
(Blackwell Science Ltd and the Eurographics Association, 1993)Based on the theory of light energy transfer between two differential diffuse surface areas, a generalized radiosity approach is presented. Unlike the conventional radiosity method, curved surfaces are subdivided into ... -
Updating Polygonizations*
(Blackwell Science Ltd and the Eurographics Association, 1993)In this paper we consider polygonizations that are robust when faced with changes in the vertices that are present or in their position. We analyze the dynamic maintenance of different types of polygonizations (monotone, ... -
On the Application of Quantization and Dithering Techniques to History of Arts
(Blackwell Science Ltd and the Eurographics Association, 1993)The diffusion of computing techniques within humane studies is considerably increasing, due to technological advances and reduction in computing costs, with History of Arts being one of the most interesting fields of ... -
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 ... -
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, ... -
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 ...