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Streamlining IBL workflows with computer vision and USD

Published: 28 July 2019 Publication History

Abstract

DNEG is constantly improving its global tools and processes to make them more efficient and artist-friendly, while leveraging state-of-the-art technologies and trends in the industry. The special requirements for Sony Pictures'Venom movie were the perfect opportunity for us to improve our Image Based Lighting (IBL) workflows. In this paper we present the iblManager: a semi-automated system to allow fast and artist-friendly extraction of numerous lights from HDR images (HDRIs), using computer vision. The system uses LightCache, a USD-based implementation of light descriptions, to allow cross-DCC usage and pipeline integration.

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References

[1]
Paul Debevec. 2006. A Median Cut Algorithm for Light Probe Sampling. In ACM SIGGRAPH 2006 Courses (SIGGRAPH '06). ACM, New York, NY, USA, Article 6.
[2]
Tadao Mihashi, Dan Abrams, Paul Lambert, Marco Maldonado, and Jesse James Chisholm. 2009. The Light Kit: HDRI-Based Area Light System for "The Curious Case of Benjamin Button". In SIGGRAPH 2009 Talks: Two Bolts and a Button.
[3]
Ben Snow. 2010. Terminators and Iron Men: Image-Based Lighting and Physical Shading at ILM. In SIGGRAPH 2010 Course: Physically Based Shading Models in Film and Game Production.
[4]
Alex Suter, Dan Lobl, Victor Schutz, and Brian Gee. 2016. LightCraft: Extract Light Position and Information from On-set Photography. In ACM SIGGRAPH 2016 Talks (SIGGRAPH '16). ACM, New York, NY, USA, Article 15, 2 pages.

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Published In

cover image ACM Conferences
SIGGRAPH '19: ACM SIGGRAPH 2019 Talks
July 2019
143 pages
ISBN:9781450363174
DOI:10.1145/3306307
Permission to make digital or hard copies of part or all of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for third-party components of this work must be honored. For all other uses, contact the Owner/Author.

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Association for Computing Machinery

New York, NY, United States

Publication History

Published: 28 July 2019

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Author Tags

  1. HDRI
  2. USD
  3. automation
  4. computer vision
  5. lighting
  6. pipeline
  7. workflow

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SIGGRAPH '19
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