Focuses on the use of computer graphics technology in the creation of animations illustrating the September 11 terrorist attacks in the U.S. Role of three-dimensional (3D) animation in informing the world; Steps used ...
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Focuses on the use of computer graphics technology in the creation of animations illustrating the September 11 terrorist attacks in the U.S. Role of three-dimensional (3D) animation in informing the world; Steps used to get 3D animations of vehicles used in the attacks; Development of logo for the event coverage using Chyron's Liberty paint and animation software.
computer graphics and computer vision deal with converse problems. In graphics the goal is to synthesize the image(s) of a scene from a given description in terms of a model or some observed data. In vision, on the ot...
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computer graphics and computer vision deal with converse problems. In graphics the goal is to synthesize the image(s) of a scene from a given description in terms of a model or some observed data. In vision, on the other hand, the aim is to create a description of the world (the scene), given the image(s). Due to this difference of the goals the two fields have developed separately. Nevertheless, they often deal with aspects of the same physical reality. Therefore, many fundamental concepts and problems are shared by the two areas, even though the context may differ. In this paper we discuss some of the issues which unify and discriminate the fields. The purpose is not to present a self-contained presentation of the relevant notions and techniques. We refer to the existing literature for such details. Instead we try to elucidate aspects in which the two fields may benefit from each other and aspects in which this may be difficult.
This paper is a contribution to the domain of computer tools for architectural and archeological restitution of ancient buildings. We describe an application of these tools to the modeling of the 14th century AD. Ther...
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This paper is a contribution to the domain of computer tools for architectural and archeological restitution of ancient buildings. We describe an application of these tools to the modeling of the 14th century AD. Thermae of Constantin in Aries, south of France. It was a diploma project in School of Architecture of Marseille-Luminy, and took place in a context defined in the European ARELATE project. The general objective of this project is to emphasize the archeological and architectural heritage of the city of Aries;it aims, in particular, to equip the museum of ancient Aries with a computer tool enabling the storage and consultation of archaeological archives, the communication of information and exchange by specialized networks, and the creation of a virtual museum allowing a redescription of the monuments and a "virtual" visit of ancient Aries. Our approach involves a multidisciplinary approach, calling on architecture, archeology and computer science. The archeologist's work is to collect information and interpret it;this is the starting point of the architect's work who, using these elements, suggests an architectural reconstruction. This synthesis contains the functioning analysis of the structure and building. The potential provided by the computer as a tool (in this case, the POV-Ray software) with access to several three-dimensional visualizations, according to hypotheses formulated by the architect and archaeologists, necessitates the use of evolutive models which, thanks to the parametrization of dimensions of a building and its elements, can be adapted to all the changes desired by the architect. The specific contribution of POV-Ray in architectural reconstruction of thermae finds its expression in four forms of this modeling program, which correspond to the objectives set by the architect in agreement with archeologists: (a) The parametrization of dimensions, which contributes significantly in simplifying the reintervention process of the architectural
The article presents information on research into the development of user-friendly computer graphics design programs. The project is intended to make three-dimensional (3-D) and animated computer graphics easy for a n...
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The article presents information on research into the development of user-friendly computer graphics design programs. The project is intended to make three-dimensional (3-D) and animated computer graphics easy for a non-professional to manipulate. A comparison is made to the spread of software programs which made professional-looking typefaces and printing ubiquitous. The development of prototype programs called Teddysystem and MovingSketch is described. The methods which were used to simplify the computer processing and control inputs are explained.
The article discusses the author's subjective presentations of some of the substantial visions and challenges that the world of the information and communication technology (ICT) faces, and for which computer grap...
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The article discusses the author's subjective presentations of some of the substantial visions and challenges that the world of the information and communication technology (ICT) faces, and for which computer graphics is an enabling technology. The fundamental concept of image-based rendering (IBR) will be fully developed through applying a set of given images from a scene and synthesizing new views of this scene from these images. The author cites that the challenges of real-time IBR include the enhancement of bandwidth, image analysis, and image synthesis. He stresses that extensive research and development in computer graphic tools and techniques will allow multivariate large-scale data presentation and interaction capabilities for data analysis.
The development of a computer program to display results of 3-D analysis is described and discussed. The program can data in the desired format, display a representation of a 3-D grid in the recent version limited to ...
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The development of a computer program to display results of 3-D analysis is described and discussed. The program can data in the desired format, display a representation of a 3-D grid in the recent version limited to 10 × 10 × 10 divisions, and fill the grid with colors and shades representing different chemical elements and their concentration. To allow a detailed inspection of the analyzed volume from different viewing angles, the whole 3-D scene can be rotated to any desired position. To allow inspection of the interior of the analyzed volume, the display can be cross-sectioned or scanned through in various directions. Capabilities and limitations of the program as well as unresolved problems and suggestions for its future development are presented. The program is tested using a model data file representing a simplified 3-D microelectronic circuit and a complex shape inclusion in the matrix material.
This article surveys the theory and techniques of computer graphics and animation. The main topics are modeling primitives, transformations and colors, visible surface algorithms, light and shadows, ray-tracing, textu...
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This article surveys the theory and techniques of computer graphics and animation. The main topics are modeling primitives, transformations and colors, visible surface algorithms, light and shadows, ray-tracing, texture, phenomena modeling, principles of computer animation, classification of computer animation methods, key-frame animation, and animation of synthetic actors.
Today's composite materials enable designers to conceive innovative designs with desired response characteristics. However, the process of converting the optimization output obtained from the structural analysis o...
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Today's composite materials enable designers to conceive innovative designs with desired response characteristics. However, the process of converting the optimization output obtained from the structural analysis of complex composite components into a reliable manufacturable product has remained a laborious and painstaking task. This has lead to large cycle times resulting in reduced cost effectiveness. For reducing the manual effort and for better visualisation of the process a software system, AUTOLAY, has been developed. The aim of this paper is to demonstrate the effective utilization of computer graphics for different aspects of design and manufacture of aircraft composite components using the AUTOLAY system.
computer graphics is often confronted with the task of providing the viewer with a visual picture of some object that is too large to fit on a computer screen unless the image is scaled down so drastically that much o...
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computer graphics is often confronted with the task of providing the viewer with a visual picture of some object that is too large to fit on a computer screen unless the image is scaled down so drastically that much of the detail is lost. The viewer is then asked to work with a partial view of the object, and use a keyboard or a mouse to (a) scroll this image horizontally or vertically, or (b) zoom in or out, or (c) rotate the object. These techniques are strikingly similar to those that the human visual system uses to deal with a similar problem. One crucial difference is that of peripheral vision-the human eye, while concentrating on a small part of the field of vision, still retains a hazy view of the peripheral region preventing it from losing sight of the total picture. This paper argues that the lack of a similar peripheral vision is a major deficiency in computer graphics today. It then goes on to develop a mapping technique that tries to simulate this peripheral vision, and, thereby, make computer graphics more powerful and versatile. The paper analyses the distortions induced by such a mapping, and argues at length why these do not pose serious problems. The suggested mapping is closely related to non-Euclidian geometry;this ties in with the fact established by experimental psychologists over 50 years ago that the perceptual geometry of human vision is strongly non-Euclidian. Thus, if one were to adapt the Turing test for artificial intelligence to computer vision, then non-Euclidian geometry can be expected to play a key role in any attempt to satisfy that test. Building on these ideas, the paper demonstrates that computer graphics has a great deal to learn from non-Euclidian geometry, and that, in tum, computer graphics can contribute significantly to the intelligent application of non-Euclidian geometries to real life problems.
Nineteen cloth-modeling techniques are summarized and categorized by their main theoretical method: geometrical, physical, or hybrid. Recommendations for future work consider the different goals in textile engineering...
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Nineteen cloth-modeling techniques are summarized and categorized by their main theoretical method: geometrical, physical, or hybrid. Recommendations for future work consider the different goals in textile engineering and computer graphics.
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