Browsing Issue 3 by Title
Now showing items 9-28 of 41
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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 ... -
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. ... -
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 ... -
GKS-9x: Some Implementation Considerations
(Blackwell Science Ltd and the Eurographics Association, 1993)The Graphical Kernel System (GKS) was published as an ISO standard for computer graphics programming in August 1985. GKS is now undergoing revision in ISO/IEC and at the time of writing the text of the Draft International ... -
An Integral Geometry Based Method for Fast Form-Factor Computation
(Blackwell Science Ltd and the Eurographics Association, 1993)Monte Carlo techniques have been widely used in rendering algorithms for local integration. For example, to compute the contribution of a patch to the luminance of another. In the present paper we propose an algorithm 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 ... -
Introducing blending operations in feature models
(Blackwell Science Ltd and the Eurographics Association, 1993)We describe the implementation of a blending facility in the context of a feature modelling system where solid and feature-based modelling operations can be utilized in parallel during the design process of a part. The ... -
Landscapes Synthesis Achieved through Erosion and Deposition Process Simulation
(Blackwell Science Ltd and the Eurographics Association, 1993)This paper describes an original approach to terrain evolution in landscapes synthesis. In order to create some realistic landforms, we simulate geologically contrasted terrains and apply to them deterministic erosion ... -
Modeling of Skylight and Rendering of Outdoor Scenes
(Blackwell Science Ltd and the Eurographics Association, 1993)Photorealistic animated images are extremely effective for pre-evaluating visual impact of city renewal and construction of tall buildings. In order to generate a photorealistic image not only the direct sunlight but also ... -
A New Paradigm for Geometric Processing
(Blackwell Science Ltd and the Eurographics Association, 1993)A new paradigm for geometric processing is proposed. The paradigm can be featured by the four key phrases: (1) Totally Four Dimensional Homogeneous Processing, (2) 4 ? 4 Matrix Method and 4 ? 4 Determinant Method, (3) ... -
A New Radiosity Approach Using Area Sampling for Parametric Patches
(Blackwell Science Ltd and the Eurographics Association, 1993)A high precision illumination model is indispensable for lighting simulation and realistic image synthesis. For the purpose of improving realism, research on global illumination has been done, and several papers on radiosity ... -
Nonsplitting Macro Patches for Implicit Cubic Spline Surfaces
(Blackwell Science Ltd and the Eurographics Association, 1993)Macro patches are important for generating quadric or cubic implicit spline surfaces from the input of a polyhedron. All existing macro patches split the triangular facets of the polyhedron- this paper presents cubic ... -
An Object Model for Multimedia Programming
(Blackwell Science Ltd and the Eurographics Association, 1993)The development of multimedia applications is a complex task. Much of this complexity stems from requirements associated with programming multiple media objects and the control of dependences and inter-relationships between ... -
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 ...