SIGGRAPH

The mapping of images onto surfaces may substantially increase the realism and information content of computer-generated imagery. The projection of a flat source image onto a curved surface may involve sampling difficulties, however, which are ...

The traditional point source light used for synthetic image generation provides no adjustments other than position, and this severely limits the effects that can be achieved. It can be difficult to highlight particular features of an object. This paper ...

Texture is an important surface characteristic which provides a great deal of information about the nature of a surface, and several computationally complex algorithms have been implemented to replicate realistic textures in computer shaded images. ...

A UIMS developed at the University of Toronto is presented. The system has two main components. The first is a set of tools to support the design and implementation of interactive graphics programs. The second is a run-time support package which handles ...

The SYNGRAPH system automatically generates graphical user interfaces. It generates interactive Pascal programs from a description of the input language's grammar. From the grammar it deduces information about how to manage both physical and simulated ...

This paper describes an interactive computerized editor for Benesh Movement Notation that aids in the preparation of dance scores on a medium resolution colour display. Benesh Movement Notation is a two-dimensional system for recording human movement in ...

Described is a visible surface algorithm and an implementation that generates shaded display of objects with hundreds of polygons rapidly enough for interactive use — several images per second. The basic algorithm, introduced in [Fuchs, Kedem and Naylor,...

This paper presents a new methodology for resolving visible surface images of solid models derived from Boolean combinations of volumetric building blocks. The algorithm introduced here is an extension of well-established scan-line hidden surface ...

Many interesting surfaces can be written as polynomial functions of the spatial coordinates, often of low degree. We present a method based on a ray casting algorithm, extended to work in more than three dimensions, to produce pictures of these ...

We present new algorithms for efficient ray tracing of three procedurally defined objects: fractal surfaces, prisms, and surfaces of revolution. The fractal surface algorithm performs recursive subdivision adaptively. Subsurfaces which cannot intersect ...

This panel session is intended to present recent technical developments in the efforts to standardize computer graphics.

Several alternative approaches to 3-D standards will be presented and contrasted. The Virtual Device Metafile will be presented, as ...

The essential grammatical information of American Sign Language (ASL) is conveyed through changes in the movement and spatial contouring of the hands and arms. An interactive computer graphic system is described for the analysis and modeling of sign ...

Many modern computer languages allow the programmer to define and use a variety of data types. Few programming systems, however, allow the programmer similar flexibility when displaying the data structures for debugging, monitoring and documenting ...

If there is to be widespread acceptance of computer generated images in areas traditionally served by graphic artists, these images must meet a high standard of quality. Document preparation systems are an application area that is gaining maturity in ...

This panel will discuss the issues and the problems associated with the simulation of natural phenomena. This is a difficult area of research since it generally involves complex data bases and in many instances time variant phenomena. The computational ...

Popular approaches to speeding up scan conversion often employ parallel processing. Recently, several special-purpose parallel architectures have been suggested. We propose an alternative to these systems: the general-purpose ultracomputer, a parallel ...

This algorithm draws lines on a gray-scale raster display by dragging a “brush” along the path of the line. The style of the line is determined by the properties of the brush. An anti-aliasing calculation is performed once for the brush itself and ...

An edge, when point-sampled for display by a raster device and not aligned with a display axis, appears as a stair-case.This common aliasing artifact often occurs in computer images generated by two- and three-dimensional algorithms. The precise edge ...

The design and implementation of a basic graphics system for a heterogeneous network environment is described. The design has been influenced by the SIGGRAPH Core System, GKS, and proposals being considered by the ANSI Technical Committee on Computer ...

The development of our graphics environment over the past year has been directed towards demonstrating the concept of broadcast teletext service, where pages of graphics and text are received in the home over existing television channels. We have ...

Minimal GKS is a subset of the Draft International Standard Graphical Kernel System. Minimal GKS has been implemented at Sandia in the programming language C. This implementation confirms that Minimal GKS does indeed have the anticipated advantages of ...

The Beta-spline introduced recently by Barsky is a generalization of the uniform cubic B-spline: parametric discontinuities are introduced in such a way as to preserve continuity of the unit tangent and curvature vectors at joints (geometric continuity) ...

An algebraic curve is a set of points in the plane satisfying an equation F(x,y) = 0, where F(x,y) is a polynomial in x and y with rational number coefficients. The topological structure of an algebraic curve can be complicated. It may, for example, ...

Parametric piecewise-cubic functions are used throughout the computer graphics industry to represent curved shapes. For many applications, it would be useful to be able to reliably derive this representation from a closely spaced set of points that ...

PANEL COORDINATOR'S INTRODUCTORY REMARKS

Japanese interest in computer graphics in the past has been led by users whose needs have been satisfied primarily by U. S. sources. However, as the Japanese market has grown, domestic players have emerged, ...

This paper describes the results of basic studies on procedures for creating solid models of component geometry from two-dimensional orthographic projections. An interactive graphic program was developed to allow the input of three orthographic views of ...