SIGGRAPH

While simple line-drawing techniques produce “jagged” lines on raster images, more complex anti-aliasing, or filtering, techniques use gray-scale to give the appearance of smooth lines and edges. Unfortunately, these techniques are not frequently used ...

Recently several investigators have studied the problem of displaying text characters on grey level raster scan displays. Despite arguments suggesting that grey level displays are equivalent to very high resolution bitmaps, the performance of grey level ...

An algorithm for determining visible lines or visible surfaces in polygonal form, at object resolution, is presented. The original scene must consist of non-intersecting planar polygons. The procedure relies on image coherence, since the sampling is ...

The paper discusses algorithms for filling contours in raster graphics. Its major feature is the use of the line adjacency graph for the contour in order to fill correctly nonconvex and multiply connected regions, while starting from a “seed.” Because ...

Given an arbitrary simple polygon with N vertices we present an algorithm for shading the interior of the polygon with a set of parallel lines where the slope and the distance between lines are prespecified. If the number of shading line segments is M, ...

Frame-to-frame coherence is the highly structured relationship that exists between successive frames of certain animation sequences. From the point of view of the hidden surface computation, this implies that parts of the scene will become visible or ...

The continuing evolution of microelectronics provides the tools for developing new methods of synthesizing digital images by utilizing parallel processing architectures which hold the promise of reliability, flexibility and low cost. Beginning with the ...

A video-resolution frame buffer system with 32 bits per pixel is described. The system includes, in addition to standard features for limited zoom and pan, an arithmetic unit at the update port which allows local computation of many frequently-used ...

Interactive use of a display requires the capability to update the display rapidly. This paper describes an on-going project at Carnegie-Mellon University in which we are designing a frame buffer raster-scan display system which has the high performance ...

System design is undergoing radical changes that are significant both for the graphics community and for other design communities in which the principal hardware resources are those obtained via catalogues of parts. The drive to reduce system costs ...

Color is a significant component of computer aided visualization of information, concepts and ideas. The use of color in all applications of computer graphics enhances the image, clarifies the information presented, and helps distinguish features that ...

The ability of the user of a graphics system to interactively control the motions of 3-D objects enhances his or her spatial perception and comprehension of those objects. This paper describes several logical devices based on the tablet, each ...

We present a methodology for the design of interactive user interfaces. This methodology provides the designer with a number of steps to be followed in the design of a user interface. Examples of a formal notation for describing user interfaces are ...

Consider a large-format display before the user, bearing a multiplicity of “windows,” like little movies, the majority dynamic and in color. There are upwards of 20 windows, say, more than a person can ordinarily absorb at once. Some of the windows come ...

SIGGRAPH has long provided a forum for the presentation, discussion, evaluation, and appreciation of beautiful algorithms and beautiful pictures. The Video Panel Session on Interactive Systems is a new SIGGRAPH event, affording us the opportunity to ...

A full implementation of the proposed standard Core System graphics subroutine package, including raster extensions, is described. Emphasis is placed on the internal structure of the implementation, and on critical design decisions. Salient features of ...

GRAMPS, a graphics language interpreter has been developed in FORTRAN 77 to be used in conjunction with an interactive vector display list processor (Evans and Sutherland Multi-Picture-System). Several of the features of the language make it very useful ...

An attribute binding model is presented and discussed to illustrate the use of such reference models in the ANSI X3H3 graphics software standardization effort. The model helps in defining and illustrating issues, and in explaining the proposed standard ...

In developing a mathematical representation for a surface, designers currently must use line drawing graphics to examine the curvature of a line in a plane, a two-dimensional analysis. By combining a result from differential geometry with the use of ...

Computer aids for design ignore, in general, one of the critical areas in present day society. This is the workplace, where men and machines interact to produce goods or generate services with a mixture of social, economic and industrial objectives.

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A system has been developed which utilizes variational geometry in the design and modification of mechanical parts. Three-dimensional constraints between characteristic points are used to define an object's geometry. Modification of geometry is ...

This session was originally organized in response to manufacturers' requests that the ACM sponsor a forum for discussion of issues relating to business aspects (i.e. management, marketing, finance, corporate planning, product development, etc.) of the ...

An experimental system is described for the design, development, and presentation of computer-based documents that combine pictures and text on a high-resolution raster color display. Such documents can be used, for example, for maintenance and repair ...

Motion analysis is the systematic and usually quantitative study of the movements of humans, animals, organisms, cells, or other entities as recorded on movie film or video tape. Despite the utility of computer-aided motion analysis to many biological, ...

This paper describes the design philosphy and features of DATAPLOT—a high-level (free-format English-like syntax) language for:

1) graphics (continuous or discrete);

2) fitting (linear or non-linear);

3) general data analysis;

4) mathematics.

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A process for creating repeating patterns of the hyperbolic plane is described. Unlike the Euclidean plane, the hyperbolic plane has infinitely many different kinds of repeating patterns. The Poincare circle model of hyperbolic geometry has been used by ...

The MITRE Corporation, a not for profit Federal Contract Research Center (FCRC), has been involved in Command, Control and Communications (C ³) Systems Engineering for the past twenty years. MITRE's program in support of the Defense Communications ...

In 1965, Shepard introduced a general interpolation formula for arbitrarily spaced data over any finite dimensional Euclidean space. The deficiencies in his initial results have been corrected and later derivations have been widely applied to surface ...

Several members of the American National Standards Institute (ANSI) Technical Committee X3H3 on Computer Graphics will present current issues of the standardization effort. The focus of the discussion will be the technical content of these issues.

The ...

Recognition and simulation of actions performable on rigidly-jointed actors such as human bodies have been the subject of our research for some time. One part of an ongoing effort towards a total human movement simulator is to develop a system to ...