Volume 16 (1997): Recent submissions
Now showing items 41-60 of 101
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A Million Polygons, a Million Pixels: Which is Heavier?
(Blackwell Publishers Ltd and the Eurographics Association, 1997)The impressive progress of rendering software and hardware over the last two decades often leads to the - too rapid - conclusion that high-quality 3D imagery can now be incorporated in all sorts of applications. Interestingly, ... -
Modelling the Garden of Perfect Brightness
(Blackwell Publishers Ltd and the Eurographics Association, 1997)The Yuan Ming Yuan, the Garden of Perfect Brightness, was the culmination of the art of Chinese Imperial gardens. Covering 350 hectares (875 acres) northwest of Beijing, it included 140 distinct sites, 2000 structures, ... -
The Personal Interaction Panel - a Two-Handed Interface for Augmented Reality
(Blackwell Publishers Ltd and the Eurographics Association, 1997)This paper describes the introduction of a new interaction paradigm to augmented reality applications. The everyday tool handling experience of working with pen and notebooks is extended to create a three dimensional ... -
A Modeling and Rendering Method for Snow by Using Metaballs
(Blackwell Publishers Ltd and the Eurographics Association, 1997)The display of natural scenes such as mountains, trees, the earth as viewed from space, the sea, and waves have been attempted. Here a method to realistically display snow is proposed.In order to achieve this, two important ... -
Using Subdivision on Hierarchical Data to Reconstruct Radiosity Distribution
(Blackwell Publishers Ltd and the Eurographics Association, 1997)Computing global illumination by finite element techniques usually generates a piecewise constant approximation of the radiosity distribution on surfaces. Directly displaying such scenes generates artefacts due to ... -
Normal Computation for Discrete Surfaces in 3D Space
(Blackwell Publishers Ltd and the Eurographics Association, 1997)Associating normal vectors to surfaces is essential for many rendering algorithms. We introduce a new method to compute normals on discrete surfaces in object space. Assuming that the surface separates space locally into ... -
Generating Reflected Directions from BRDF Data
(Blackwell Publishers Ltd and the Eurographics Association, 1997)Monte-Carlo path tracing algorithms for computer graphics require that given an incident light ray at a surface an outgoing direction can be computed with a distribution given by the magnitude of the bidirectional reflectance ... -
Optimal Source Selection in Shooting Random Walk Monte Carlo Radiosity
(Blackwell Publishers Ltd and the Eurographics Association, 1997)In this paper we study how to optimally select between different sources in shooting random walk Monte Carlo Radiosity. Until now the probability of selecting a source has been made proportional to the importance of that ... -
Virtually Documented Environments: A New Interface Paradigm for Task-oriented Access to Information
(Blackwell Publishers Ltd and the Eurographics Association, 1997)We present a suitable virtually documented environment system providing the user with high level interaction possibilities. The system is dedicated to applications where the operator needs to have his hands free in order ... -
Bounded Radiosity - Illumination on General Surfaces and Clusters
(Blackwell Publishers Ltd and the Eurographics Association, 1997)Traditionally, Radiosity algorithms have been restricted to scenes made from planar patches. Most algorithms for computing form factors and the subdivision criterion for hierarchical methods implicitly assume planar patches. ... -
A Framework for Interacting with Paper
(Blackwell Publishers Ltd and the Eurographics Association, 1997)This paper reports on ways of using digitised video from television cameras in user interfaces for computer systems. The DigitalDesk is built around an ordinary physical desk and can be used as such, but it has extra ... -
Radiosity with Well Distributed Ray Sets
(Blackwell Publishers Ltd and the Eurographics Association, 1997)In this paper we present a new radiosity algorithm, based on the notion of a well distributed ray set (WDRS). A WDRS is a set of rays, connecting mutually visible points and patches, that forms an approximate representation ... -
An Analysis of Quasi-Monte Carlo Integration Applied to the Transillumination Radiosity Method
(Blackwell Publishers Ltd and the Eurographics Association, 1997)This paper presents an enhanced transillumination radiosity method that can provide accurate solutions at relatively low computational cost. The proposed algorithm breaks down the double integral of the gathered power to ... -
A Rendering Equation for Specular Transfers and Its Integration into Global Illumination
(Blackwell Publishers Ltd and the Eurographics Association, 1997)In this paper, we present a rigorous theoretical formulation of the fundamental problem-indirect illumination from area sources via curved ideal specular surfaces. Intensity and area factors are introduced to clarify this ... -
Painting-like Image Emphasis based on Human Vision Systems
(Blackwell Publishers Ltd and the Eurographics Association, 1997)Regional image emphasis is often evident in paintings and illustrations. This technique increases local contrast while reducing global contrast by amplifying image intensity on shadowed surfaces, reducing intensity on ... -
Tunnel-Free Supercover 3D Polygons and Polyhedra
(Blackwell Publishers Ltd and the Eurographics Association, 1997)A new discrete 3D line and 3D polygon, called Supercover 3D line and Supercover 3D polygon, are introduced. Analytical definitions are provided. The Supercover 3D polygon is a tunnel free plane segment defined by vertices ... -
Steering Image Generation with Wavelet Based Perceptual Metric
(Blackwell Publishers Ltd and the Eurographics Association, 1997)It is often the case that images generated by image synthesis algorithms are judged by visual examination. The user resorts to an iterative refinement process of inspection and rendering until a satisfactory image is ... -
Fast Analytic Shading and Shadowing for Area Light Sources
(Blackwell Publishers Ltd and the Eurographics Association, 1997)This paper describes a fast analytic algorithm that generates exact highlights and soft shadows from area light sources. In order to realize fast shadowing, we propose the ray-oriented buffer which segments 3D space by ... -
Interactive High-Quality Soft Shadows in Scenes with Moving Objects
(Blackwell Publishers Ltd and the Eurographics Association, 1997)Interactive rendering of soft shadows (or penumbra) in scenes with moving objects is a challenging problem. High quality walkthrough rendering of static scenes with penumbra can be achieved using pre-calculated discontinuity ... -
Efficient Impostor Manipulation for Real-Time Visualization of Urban Scenery
(Blackwell Publishers Ltd and the Eurographics Association, 1997)Urban environments present unique challenges to interactive visualization systems, because of the huge complexity of the geometrical data and the widely varying visibility conditions. This paper introduces a new framework ...