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Making Shaders More Physically Plausible
(Blackwell Science Ltd and the Eurographics Association, 1994)
There is a need to develop shaders that not only"look good", but are more physically plausible. From physical and geometric considerations, we review the derivation of a shading equation expressing rejected radiance in ...
A Survey of Shading and Reflectance Models
(Blackwell Science Ltd and the Eurographics Association, 1994)
Since the beginning of computer graphics, three decades ago, a large number of models intended to describe the behaviour of light on a given point of a surface have been proposed. Almost every author uses his own terminology ...
Strands, Gravity and Botanical Tree Imagery
(Blackwell Science Ltd and the Eurographics Association, 1994)
This paper presents a technique for the modelling and rendering of realistic botanical tree images. A strand model is used that is analogous to the internal vascular structure of a tree. The model is"grown" under the ...
Constant-Time Filtering by Singular Value Decomposition?
(Blackwell Science Ltd and the Eurographics Association, 1994)
We present a technique implementing space-variant filtering of an image, with kernels belonging to a given family, in time independent of the size and shape of the filter kernel support. The essence of our method is efficient ...
Computer Generated Copper Plates
(Blackwell Science Ltd and the Eurographics Association, 1994)
Making computer generated copper plates with image generation algorithms is presented. The method uses a kind of volume texturing in connection with image processing algorithms, and is suitable for implementation in a ray ...
Wavelet Projections for Radiosity
(Blackwell Science Ltd and the Eurographics Association, 1994)
One important goal of image synthesis research is to accelerate the process of obtaining realistic images using the radiosity method. Two important concepts recently introduced are the general framework of projection methods ...
Experiments in the Parallel Computation of 3D Convex Hulls
(Blackwell Science Ltd and the Eurographics Association, 1994)
Two parallel implementations of a 3D convex hull algorithm are reported. The paper considers a MIMD distributed memory architecture and the implementations are carried out on the Meiko Computing Surface using T800 transputers ...
Classification of Ray-Generators in Uniform Subdivisions and Octrees for Ray Tracing
(Blackwell Science Ltd and the Eurographics Association, 1994)
Spatial subdivisions cause an enormous acceleration of ray tracing due to the reduction of ray-object intersections. For this purpose it is necessary to generate the sequence of ray-cells (all cells met consecutively by a ...
Five-dimensional Adaptive Subdivision for Ray Tracing
(Blackwell Science Ltd and the Eurographics Association, 1994)
This paper presents a directional subdivision method for speeding up ray tracing. This method is easy to use, because it automatically adapts the subdivision to the scene relieving the user from having to set parameters ...
A Theoretical Framework for Physically Based Rendering
(Blackwell Science Ltd and the Eurographics Association, 1994)
In this paper we introduce the concept of the global reflection distribution function which allows concise formulation of the global illumination problem. Unlike previous formulations it is not geared towards any specific ...