Acceleration Techniques for 3D Ray Tracing for Outdoor Propagation Model
نویسندگان
چکیده
منابع مشابه
Dynamic Acceleration Structures for Interactive Ray Tracing
Acceleration structures used for ray tracing have been designed and optimized for efficient traversal of static scenes. As it becomes feasible to do interactive ray tracing of moving objects, new requirements are posed upon the acceleration structures. Dynamic environments require rapid updates to the acceleration structures. In this paper we propose spatial subdivisions which allow insertion a...
متن کاملAccelerated Three Dimensional Ray Tracing Techniques Using Ray Frustums for Wireless Propagation Models
In this paper, accelerated techniques for three dimensional ray tracing using the concept of ray frustums are presented for the fast characterization of wireless communications, where various radio propagation paths such as wall-transmitted wave and scattered wave from buildings and ground are generated. To accommodate such scatterers, objects are modeled by triangulated meshes, and potential r...
متن کاملAn efficient indoor ray-tracing propagation model with a quasi-3D approach
This paper presents an indoor propagation model that uses image-based ray-tracing with a quasi-3D approach. A fast 2D algorithm finds the most relevant rays lying in the horizontal plan of the indoor environment. Then, every path is converted into five rays that lie in the vertical plane. As a consequence, the thirddimension effect is considered in the field computation. Comparisons were made w...
متن کاملSimulation in Urban Environment of a 3d Ray Tracing Propagation Model Based on Building Database Preprocessing
The analysis and simulation of electromagnetic (EM) wave propagation represent a crucial task in planning cellular networks for mobile communication. When an adequate building database is available, deterministic 3D ray tracing techniques are quite useful and accurate to face this problem, but since their computational complexity is time consuming, a preprocessing step is necessary. Such a step...
متن کاملAcceleration methods for ray tracing based global illumination
The generation of photorealistic images is one of the major topics in computer graphics. By using the principles of physical light propagation, images that are indistinguishable from real photographs can be generated. This computation, however, is a very time-consuming task. When simulating the real behavior of light, individual images can take hours to be of sufficient quality. For this reason...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Journal of Korean Institute of Electromagnetic Engineering and Science
سال: 2007
ISSN: 1226-3133
DOI: 10.5515/kjkiees.2007.18.11.1231