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Tracing Ray Differentials - Stanford University
https://graphics.stanford.edu/papers/trd/
Tracing Ray Differentials. Homan Igehy,Stanford University. Appears in the Computer Graphics (SIGGRAPH '99 Proceedings) Abstract: Antialiasing of ray traced images is typically performed by super-samplingthe image plane. While …
Tracing Ray Differentials - Stanford University
https://graphics.stanford.edu/papers/trd/trd_jpg.pdf
Tracing Ray Differentials Homan Igehy Computer Science Department Stanford University Abstract Antialiasing of ray traced images is typically performed by s uper-sampling the image plane. While this type of filtering works well for many algorithms, it is much more efficient to perform filtering locally on a surface for algorithms such as texture mapping. In
Tracing Ray Differentials - ResearchGate
https://www.researchgate.net/publication/2460339_Tracing_Ray_Differentials
In classical ray tracing, ray differentials [Ige99] is developed to track the distance between two neighboring rays for texture filtering. Path differentials [SW01] is an extension of ray ...
Tracing Ray Differentials - CORE
https://core.ac.uk/display/22940641
Tracing Ray Differentials . By Homan Igehy. Abstract. Antialiasing of ray traced images is typically performed by supersampling the image plane. While this type of filtering works well for many algorithms, it is much more efficient to perform filtering locally on a surface for algorithms such as texture mapping. In order to perform this type of ...
Ray Differential - an overview | ScienceDirect Topics
https://www.sciencedirect.com/topics/computer-science/ray-differential
The appropriate brick map level is determined from the ray differential. The ray differential describes the difference between a ray and its (real or imaginary) neighbor rays. Ray differentials were introduced for specular reflection by Igehy [Ige99] and extended to diffuse reflection by Suykens and Willems [SW01]. More information about the use of ray differentials can also be …
Tracing Ray Differentials
https://cseweb.ucsd.edu/~ravir%20/papers/invrend/invrend.ppt
Tracing Ray Differentials Author: Homan Igehy Last modified by: ravir Created Date: 2/11/1999 12:43:51 AM Document presentation format: Letter Paper (8.5x11 in) Company: Stanford University Other titles
Final Gathering using Ray Differentials - CORE
https://core.ac.uk/download/pdf/295558436.pdf
Igehy proposed the use of ray differentials in 1999 [Ige99a] as a way to sample the footprint of the ray, such that textures can be sampled using a fitting kernel. By keeping track of the ray's footprint along two independant axes Igehy is able to get an anisotropic estimate of the ray's footprint using only
ray tracing for the movie Cars
https://my.eng.utah.edu/~cs5600/slides/ray%20tracing%20for%20the%20movie%20Cars.pdf
Ray differentials to the rescue • Keep track of differences between “neighbor” rays • Trace rays; each ray represents a beam [Igehy 1999] Ray differentials and ray beam ray ray beam neighbor rays • “Narrow ray”: ray beam cross-section is small • “Wide ray”: ray beam cross-section is large Ray differentials: use Ray differentials tell us:
Ray Tracing NPR-Style Feature Lines
https://www.sci.utah.edu/~roni/for-roni/NPR-lines/NPR-lines.NPAR09.pdf
describes how a slightly offset ray would behave; generalizing, it is possible to describe how the ray’s screen footprint behaves. In Igehy’s paper, the primary application of ray differentials is in surface-local texture filtering for higher quality images. He also mentions geometric level-of-detail, ray tracing caustics, and dull
Ray Differentials and Multiresolution Geometry Caching - Pixar
https://graphics.pixar.com/library/RayDifferentials/paper.pdf
2.5. Ray differentials Beam tracing10, cone tracing1, and pencil tracing25 trace bundles of light paths instead of infinitely thin rays. General intersection, reflection, and refraction calculations are diffi-cult since each bounce can split the light beam/cone/pencil. Igehy’s ray differential method11 traces single rays, but p 22 and
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