Use of the perspective projection adds important perceptual cues for image comprehension. However, it has not been widely used in volume rendering because of the lack of efficient computational algorithms and concern ...
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A new general reflectance model for computergraphics is presented . The model is based on physical optics and describes specular, directional diffuse, and uniform diffuse reflection by a surface. The reflected light ...
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Input preprocessors have come to be recognized as important components of modern finite element programs. A method is described which utilizes interactive computergraphics digitizing techniques to create a powerful i...
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Perceptually uniform color spaces can be a useful tool for solving computergraphics color selection problems. However, before they can be used effectively some basic principles of tristimulus colorimetry must be unde...
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ISBN:
(纸本)0897910214
Perceptually uniform color spaces can be a useful tool for solving computergraphics color selection problems. However, before they can be used effectively some basic principles of tristimulus colorimetry must be understood and the color reproduction device on which they are to be used must be properly adjusted. The Munsell Book of Color and the Optical Society of America (OSA) Uniform Color Scale are two uniform color spaces which provide a useful way of organizing the colors of a digitally controlled color television monitor. The perceptual uniformity of these color spaces can be used to select color scales to encode the variations of parameters such as temperature or stress. � ACM. All rights reserved.
The calculation of building thermal loads using the computer has been an accepted practice for several years. A substantial amount of research and theoretical investigation has been expended in attempts to accurately ...
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We present a new approach to lighting design for image synthesis. It is based on the inverse problem of determining light settings for an environment from a description of the desired solution. The method is useful fo...
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We introduce a new approach for the computation of view-independent solutions to the diffuse global illumination problem in polyhedral environments. The approach combines ideas from hierarchical radiosity and disconti...
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A general light transfer simulation algorithm for environments composed of materials with arbitrary reflectance functions is presented. This algorithm removes the previous practical restriction to ideal specular and/o...
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A technique for calibrating a charge coupled devices (CCD) camera for direct colorimetric comparison between the captured images of the real environment and synthetic images of the simulated environments is presented....
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A technique for calibrating a charge coupled devices (CCD) camera for direct colorimetric comparison between the captured images of the real environment and synthetic images of the simulated environments is presented. The comparison is used to validate lighting algorithms used for computing synthetic images. The calibration model relating the pixel signal to various physical factors is tested using the CCD camera and an integrating sphere uniform light source.
computer simulations can be used to generate the spatial and temporal data describing the acoustical behavior of performance halls, but typically the analytical results are difficult to assimilate and compare. By usin...
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ISBN:
(纸本)0897913124
computer simulations can be used to generate the spatial and temporal data describing the acoustical behavior of performance halls, but typically the analytical results are difficult to assimilate and compare. By using computergraphics to display the multi-dimensional data, substantially greater amounts of information than that conveyed by standard techniques can be communicated to the designer. This allows designs of different acoustical spaces to be tested, evaluated, and compared. An example comparing the acoustical behavior of three different concert halls demonstrates these techniques and allows for the simultaneous assimilation of much of the information necessary to evaluate the acoustical nature of a space. The use of three-dimensional images, color, animation and abstract representation allows for the comprehension of the complex results of a scientific simulation. Specifically, the simultaneous display of particular icons familiar to the discipline enabled the simultaneous presentation of up to twelve parameters. From a more general point of view, the procedures demonstrate how computergraphics can be utilized for the portrayal of multi-dimensional time dependent data. The visualization techniques are potentially useful for the display of three-dimensional vector fields in many scientific and design applications.
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