Showing papers on "Computer graphics lighting published in 1989"

Anthropometry for Computer Graphics Human Figures

Abstract: Anthropometry as it applies to Computer Graphics is examined in this report which documents the Anthropometry work done in the Computer Graphics Research Laboratory at the University of Pennsylvania from 1986 to 1988. A detailed description of the basis for this work is given along with examples of the variability of computer graphics human figures resulting from this work. Also discussed is the unique and versatile user interface developed to allow easy manipulation of the data used to describe the anthropometric parameters required to define human figure models. The many appendices contain the specifics of our models as well as much of the data used to define the models. Comments University of Pennsylvania Department of Computer and Information Science Technical Report No. MSCIS-89-71. Author(s) Marc R. Grosso, Richard D. Quach, Ernest Otani, Jianmin Zhao, Susanna Wei, Pei-Hwa Ho, Jiahe Lu, and Norman I. Badler This technical report is available at ScholarlyCommons: http://repository.upenn.edu/hms/67 ANTHROPOMETRY FOR COMPUTER GRAPHICS

Tutorial: Computer Graphics, Image Synthesis

Abstract: Where you can find the tutorial computer graphics image synthesis easily? Is it in the book store? On-line book store? are you sure? Keep in mind that you will find the book in this site. This book is very referred for you because it gives not only the experience but also lesson. The lessons are very valuable to serve for you, that's not about who are reading this tutorial computer graphics image synthesis book. It is about this book that will give wellness for all people from many societies.

Color in computer graphics: manipulating and matching color

Abstract: Color in graphic workstations has rapidly transitioned from a novelty with great expected potential to a highly useful tool for the communication of complex databases to a human brain. Perhaps the most dominant feature of this transition has been the recognition that color provides a significant mechanism for the communication of such large and complex sources of information. This realization builds a critical cornerstone of the emerging discipline of interactive visualization. Although disagreement exists within the graphics industry as to the exact definition of visualization, most experts agree that the concept connotes the ability to render complex databases by visual means in order to capitalize on the sensory processing capability of the visually-oriented human mind.

3-Draw: a three dimensional computer aided design tool

Abstract: 3-Draw is a tool for computer-aided design targeted at the early concept-forming stages of design. 3-Draw is intended to preserve the benefits of paper and pencil while taking advantage of the computer to develop, manipulate, and display 3-D representations of objects interactively. Designers using 3-Draw sketch out their initial ideas directly in three dimensions, using the computer to display objects in perspective and undergoing real-time motion. The hardware consists of two six-degrees-of-freedom sensors and a Silicon Graphics IRIS-4D/70GT graphics workstation. One sensor is configured to control an object's position and orientation. The other sensor is a multiconfigurable 3-D drawing/editing tool. Since the sketching is done directly in 3-D, the computer can generate limitless perspective views of models and the designer does not need to perform the image projection mentally. >

A fixed-point DSP for graphics engines

Abstract: The use of the 16-bit ADSP-2100 digital signal microprocessor as a fixed-point, low-end graphics engine for applications such as video games and small computer graphics packages is examined. It serves as the basis for a complete, hardware-oriented approach to performing graphics operations on a 3-D database. Normalization and formatting are performed to avoid overflow and preserve data formats through the transformation operation. Data structures that facilitate object rendering through the Bresenham line-segment drawing algorithm are used. A 3*3 rotation matrix is derived for this application, and the means for implementing translation, scaling, perspective, and zooming are described. >

Teaching introductory and advanced computer graphics using micro-computers

Abstract: In the past few years there have been significant advances in both the computational and graphics capabilities of micro-computers. In graphics the standard (for the IBM compatible world) has advanced from the Computer Graphics Adapter (CGA) through the Enhanced Graphics Adapter (EGA) to the present Video Graphics Array (VGA). With the multiple color capability of the VGA, images can be constructed which use graphics shading algorithms. This allows us to teach more advanced concepts in introductory courses and even to teach some topics in advanced courses using these machines. In this paper I will discuss how these hardware improvements have allowed for changes in our introductory graphics course and also our experience in teaching an advanced course using these machines.

Visualization tools at Lawrence Livermore National Laboratory

Abstract: An examination is made of three projects underway at LLNL. The Magic (Machine Graphics in Color) Project is developing techniques to move data from a Cray supercomputer and effectively display it on high-resolution color terminal in the scientist's office. In a follow-on to this project, laser disk technology provides a real-time animation capability. The Graphics Workstation Project has examined visualization applications of workstations with graphics accelerators and is currently extending this work to 'graphics minisupercomputers'. The Advanced Visualization Research Project uses high-end graphics devices to perform algorithm development, especially in the implementation of volumetric methods. >

A virtual memory system organization for bit-mapped graphics displays

Abstract: Described is a display sub-system, designed for support of a very high speed rendering engine. It provides high-performance graphics to an environment that consists of a hierarchy of resizable windows. The concept of virtual memory has been applied with the organization of the virtual to physical address spaces having a unique mapping that fits the organization of a bit-mapped graphics memory display.

Computer graphics and animation for interior and industrial designers

Abstract: Traditionally, designers communicate their ideas to other designers, architects, engineers and clients through drawings and models. Both these methods are reasonable compromises to having to build a prototype but are severely limiting and inflexible.

Obtaining machine readable computer graphics bibliographics

Abstract: For a long time now, alot of people have been asking simpl e information queries in places like comp .graphics . This resulte d in the inevitable repeating of topics, flood of inane news message s (many of which are wrong) and a repeating cycle which bring s disillusionment . Computer graphics, unlike a lot of disciplines, has an oversee r of the literature . If you open up an ACM/SIGGRAPH proceeding s you will notice a department editor for references, Baldev Sing h (currently at MCC) . Baldev has published significant reference s in Computer Graphics for a couple of years (see below) . Baldev Singh, Computer Graphics Literature for 1986 : A Bibliography . Computer Graphics 21(3), June 1987, p . 189-208 . Baldev Singh and Gunther Schrack, Computer Graphic s Literature for 1985 : A Bibliography . Computer Graphics 20(3) , July 1986, p . 85-145 . Coverage in the graphics field is quite good . I know, I am trying to maintain a comprehensive study of another field (se e postings in comp .arch or comp.parallel) . The problem is searchin g for literature on a paper database is difficult (I won't get into details, take my word) . Frequently entries are also wrong (not as bad as the net however). A machine readable form however, solves many of thes e problems . You can update a machine readable form . The problems then become distribution and search — something computers ar e good for! It is with this background that we in the Bay Are a Association for Computing Machinery's Special Interest Group on Computer Graphics announce the availability of Singh's ACM/ SIGGRAPH bibliography in a machine readable form . While Baldev will oversee the collection and quality of entries , we with a generous donation of cycles and disk space from th e Digital Equipment Corporation (DEC) will hell) oversee th e redistribution of the computer graphics bibliography . The first part of this article will describe how hosts on th e Internet can re t rieve the computer graphics bibliography . Two othe r optional means for those not on the Internet will then be presented . (But clearly Internet is the superior way to do this) . THERE ARE TWO DANGERS inherent in all of these means . The bibliography is kind of big . It's not a megabyte, but it' s getting there . IF YOU ARE at an htternet site with lots of users , it's kind of dumb if you ALL made personal copies (n megabyte s ;-) . So before you copy, agree who at your site will oversee obtainin g it . One copy per site please . The second danger is everybody copying at the same time . The information which follows will illustrate the problem . The DEC host which you will be copying from is DEC's gateway to the Internet . It will be a tragedy to abuse this gateway if every site tried to copy at once . I know, we provide the 9600 baud IMP port to DEC. So let's not abuse this, let's be patient and take our turns . 1) copy the computer graphics bibliography only durin g the weekends or evenings—Pacific Daylight or Standard time . 2) copy on a randomly determined evening of the week . How ? Flip a coin 3 times (say HTH, make Head == 0, Tails == 1 , this translates to 010 binary or 2 base 10) . Using Sunday as 1 , make Monday 2, copy Monday evening P[SD]T. (HHH or 000 , retry) . If this is confusing, wait for the weekend . AGAIN cop y only in the evenings .

A Chinese-Character and Graphics Workstation

Abstract: This paper introduces the design approaches of a Chinese-character and graphics workstation DGS-80OO which has been developed at the Computer Graphics Research Laboratory, Department of Computer Science and Engineering, Zhejiang University. The specifications, architecture, Chinese-character processing environment and working modes of the workstation are described. Especially the I/O interface with the host computer. the processor unit, the graphics generation and display unit, Chinesecharacter operating system and some main input modes of Chinese-character codes are introduced in detail.

Binocular dissociation with interactive graphics on personal computer and stereoviewer

Abstract: An IBM-PC/AT system with an enhanced graphics adapter has been interfaced with a stereoviewer of a Nintendo family game to provide a method of clinical evaluation of stereoacuity by binocular dissociation. The stereoviewer is synchronized with two digitally generated stereo patterns, which are displayed on a color monitor alternately. The amount of disparity in the stereo patterns is interactively changed and recorded through the IBM-PC/AT. The system can also show color pictures to each eye and can be used to test the binocular time separation for motor fusion. >