Global Illumination Shadow Layers
| Autor: | David Vanderhaeghe, Mathias Paulin, François Desrichard |
|---|---|
| Přispěvatelé: | Structural Models and Tools in Computer Graphics (IRIT-STORM), Institut de recherche en informatique de Toulouse (IRIT), Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées, ANR-16-CE33-0026,CaLiTrOp,Analyse des opérateurs de transport lumineux pour l'image de synthèse.(2016) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Computer science
Global illumination business.industry ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION 020207 software engineering 02 engineering and technology Computer Graphics and Computer-Aided Design GeneralLiterature_MISCELLANEOUS [INFO.INFO-GR]Computer Science [cs]/Graphics [cs.GR] Non-photorealistic rendering Rendering (computer graphics) Computer graphics Global Illumination Compositing Path tracing Shadow 0202 electrical engineering electronic engineering information engineering Shadow Layer 020201 artificial intelligence & image processing Ray tracing (graphics) Computer vision Artificial intelligence business ComputingMethodologies_COMPUTERGRAPHICS |
| Zdroj: | Computer Graphics Forum Computer Graphics Forum, Wiley, 2019, 38 (4), ⟨10.1111/cgf.13781⟩ |
| ISSN: | 0167-7055 1467-8659 |
| DOI: | 10.1111/cgf.13781⟩ |
| Popis: | International audience; Computer graphics artists often resort to compositing to rework light effects in a synthetic image without requiring a new render. Shadows are primary subjects of artistic manipulation as they carry important stylistic information while our perception is tolerant with their editing. In this paper we formalize the notion of global shadow, generalizing direct shadow found in previous work to a global illumination context. We define an object's shadow layer as the difference between two altered renders of the scene. A shadow layer contains the radiance lost on the camera film because of a given object. We translate this definition in the theoretical framework of Monte-Carlo integration, obtaining a concise expression of the shadow layer. Building on it, we propose a path tracing algorithm that renders both the original image and any number of shadow layers in a single pass: the user may choose to separate shadows on a per-object and per-light basis, enabling intuitive and decoupled edits. |
| Databáze: | OpenAIRE |
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