Portal Extraction Based on an Opening Labeling for Ray Tracing
International audience Rendering photo-realistic images from a 3D scene description remains a challenging problem when processing complex geometry exposing many occlusions. In that case, simulating light propagation requires hours to produce a correct image. An opening map can be used to extract inf...
Main Authors: | , |
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Other Authors: | , |
Format: | Conference Object |
Language: | English |
Published: |
HAL CCSD
2015
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Subjects: | |
Online Access: | https://hal.archives-ouvertes.fr/hal-01159795 https://hal.archives-ouvertes.fr/hal-01159795/document https://hal.archives-ouvertes.fr/hal-01159795/file/ismm2015.pdf https://doi.org/10.1007/978-3-319-18720-4_3 |
Summary: | International audience Rendering photo-realistic images from a 3D scene description remains a challenging problem when processing complex geometry exposing many occlusions. In that case, simulating light propagation requires hours to produce a correct image. An opening map can be used to extract information from the geometry of the empty space of a scene, where light travels. It describes local thickness and allows to identify narrow regions that are difficult to traverse with ray tracing. We propose a new method to extract portals in order to improve rendering algorithms based on ray tracing. This method is based on the opening map, which is used to define a labeling of the empty space. Then portals-2D surfaces embedded in empty space-are extracted from labeled regions. We demonstrate that those portals can be sampled in order to explore the scene efficiently with ray tracing. |
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