The Close Objects Buffer: A Sharp Shadow Detection Technique for Radiosity Methods
نویسندگان
چکیده
منابع مشابه
The Close Objects Buffer: A Sharp Shadow Detection Technique for Radiosity Methods
Detecting sharp illumination variations such as shadow boundaries is an important problem for radiosity methods. Such illumination variations are captured using a nonuniform mesh that refines the areas exhibiting high illumination gradients. Nonuniform meshing techniques like discontinuity meshing often rely on shadow casting, so their application is computationally expensive. This paper presen...
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Radiosity methods have been using several techniques in order to determine a subdivision of the environment that accurately captures the variations of the radiance field. Most of these techniques use object space approaches to predict the areas of high variation of the radiance. Such methods can be prohibitively expensive to be applied in scenes containing a large number of small ’detail’ objec...
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امروزه استفاده از منابع انرژی پراکنده کاربرد وسیعی یافته است . اگر چه این منابع بسیاری از مشکلات شبکه را حل می کنند اما زیاد شدن آنها مسائل فراوانی برای سیستم قدرت به همراه دارد . استفاده از میکروشبکه راه حلی است که علاوه بر استفاده از مزایای منابع انرژی پراکنده برخی از مشکلات ایجاد شده توسط آنها را نیز منتفی می کند . همچنین میکروشبکه ها کیفیت برق و قابلیت اطمینان تامین انرژی مشترکان را افزایش ...
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Anti-aliasing in form factor computation and precise determination of shadow boundaries are important issires for Radiosity method. A-Buffer is a technique introduced by Carpenter f o r anti-aliasing in hidden surjiace removal. In this paper, we propose a method based on the A-Bilffer to replace the Zbtlffer in the computation of form factors using the Hemicube f o r anti-aliasing. The method d...
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Shadows appear in many scenes. Shadows in images are typically affected by several phenomena in the scene, such as lighting conditions, type and behavior of shadowed surfaces, occluding objects etc. One of the core issues is to detect the shadow accurately. Accurate shadow detection can be difficult due to the illumination variations of the background and similarity between appearance of the ob...
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ژورنال
عنوان ژورنال: Journal of Graphics Tools
سال: 1997
ISSN: 1086-7651
DOI: 10.1080/10867651.1997.10487470