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High Quality Shadows for Real-time Surface Visualization
Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
2016 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

This thesis describes the implementation of a shadowing system able to produce hard shadows. Shadow mapping is the most common real-time shadowing algorithm but it suffers from severe aliasing artifacts and self-shadowing effects. Different advanced techniques based on Shadow Mapping are implemented in this thesis with the objective of creating accurate hard shadows. First, an implementation based on Cascaded Shadow Maps is presented. This technique improves the visual quality of shadow mapping by using multiple smaller shadow maps instead of a large one. The technique addresses the fact that objects near the viewer require a higher shadow map resolution than objects far away. The second technique presented is Sub-pixel Shadow Mapping. By storing information about occluding triangles in the shadow map this technique is able to produce accurate hard shadows with sub-pixel precision. Both methods can be combined in order to improve the resulting shadow quality. Finally, a collection of advanced biasing techniques that minimize the self-hadowing artifacts generated by shadow mapping are presented. The final implementation achieves real-time performances with considerably improved quality compared to standard shadow mapping.

Place, publisher, year, edition, pages
2016. , p. 40
Keyword [en]
graphics, visualization, shadows, real-time
National Category
Media and Communication Technology
Identifiers
URN: urn:nbn:se:liu:diva-133214ISRN: LiU-ITN-TEK-A--16/047--SEOAI: oai:DiVA.org:liu-133214DiVA, id: diva2:1056408
Subject / course
Media Technology
Uppsok
Technology
Supervisors
Examiners
Available from: 2016-12-14 Created: 2016-12-14 Last updated: 2018-01-13Bibliographically approved

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High Quality Shadows for Real-time Surface Visualization(1784 kB)67 downloads
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CiteExportLink to record
Permanent link

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Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
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Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
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  • Other locale
More languages
Output format
  • html
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  • asciidoc
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