liu.seSearch for publications in DiVA
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Real-time image based lighting with streaming HDR-light probe sequences
Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology. (VCL)
2012 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

This work presents a framework for shading of virtual objects using high dynamic range (HDR) light probe sequences in real-time. The method is based on using HDR environment map of the scene which is captured in an on-line process by HDR video camera as light probes. In each frame of the HDR video, an optimized CUDA kernel is used to project incident lighting into spherical harmonics in realtime. Transfer coefficients are calculated in an offline process. Using precomputed radiance transfer the radiance calculation reduces to a low order dot product between lighting and transfer coefficients. We exploit temporal coherence between frames to further smooth lighting variation over time. Our results show that the framework can achieve the effects of consistent illumination in real-time with flexibility to respond to dynamic changes in the real environment. We are using low-order spherical harmonics for representing both lighting and transfer functionsto avoid aliasing.

Place, publisher, year, edition, pages
2012. , 37 p.
Keyword [en]
Picture/Image Generation, Image based lighting, pre-computed radiance transfer, high dynamic range video
National Category
Computer Science
Identifiers
URN: urn:nbn:se:liu:diva-89099ISRN: LIU-ITN-TEK-A--12/071-SEOAI: oai:DiVA.org:liu-89099DiVA: diva2:606717
Subject / course
Master's Programme in Advanced Computer Graphics, 120 ECTS
Presentation
2012-10-26, TP32, Linköping university, Norrköping, 10:00 (English)
Uppsok
Technology
Supervisors
Examiners
Available from: 2013-02-20 Created: 2013-02-20 Last updated: 2015-09-22Bibliographically approved

Open Access in DiVA

Thesis(17495 kB)267 downloads
File information
File name FULLTEXT01.pdfFile size 17495 kBChecksum SHA-512
40f2089c45bd644a070674b1f5e1000b6b9cf65a20eca93659fbea96cdcbbc5eb241a512cbfc6077e701f51dd47b0915e0fb4dd051b9391c2a627a95098e0804
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Hajisharif, Saghi
By organisation
Media and Information TechnologyThe Institute of Technology
Computer Science

Search outside of DiVA

GoogleGoogle Scholar
Total: 267 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 174 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf