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  Perceptually Guided Corrective Splatting

Haber, J., Myszkowski, K., Yamauchi, H., & Seidel, H.-P. (2001). Perceptually Guided Corrective Splatting. In A. Chalmers, & T.-M. Rhyne (Eds.), The European Association for Computer Graphics 22th Annual Conference: EUROGRAPHICS 2001 (pp. C142-C152). Oxford, UK: Blackwell.

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 Creators:
Haber, Jörg1, Author           
Myszkowski, Karol1, Author           
Yamauchi, Hitoshi1, Author           
Seidel, Hans-Peter1, Author           
Affiliations:
1Computer Graphics, MPI for Informatics, Max Planck Society, ou_40047              

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 Abstract: One of the basic difficulties with interactive walkthroughs is the high quality rendering of object surfaces with non-diffuse light scattering characteristics. Since full ray tracing at interactive rates is usually impossible, we render a precomputed global illumination solution using graphics hardware and use remaining computational power to correct the appearance of non-diffuse objects on-the-fly. The question arises, how to obtain the best image quality as perceived by a human observer within a limited amount of time for each frame. We address this problem by enforcing corrective computation for those non-diffuse objects that are selected using a computational model of visual attention. We consider both the saliency- and task-driven selection of those objects and benefit from the fact that shading artifacts of ``unattended'' objects are likely to remain unnoticed. We use a hierarchical image-space sampling scheme to control ray tracing and splat the generated point samples. The resulting image converges progressively to a ray traced solution if the viewing parameters remain unchanged. Moreover, we use a sample cache to enhance visual appearance if the time budget for correction has been too low for some frame. We check the validity of the cached samples using a novel criterion suited for non-diffuse surfaces and reproject valid samples into the current view.

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Language(s): eng - English
 Dates: 2010-03-122001
 Publication Status: Issued
 Pages: -
 Publishing info: Oxford, UK : Blackwell
 Table of Contents: -
 Rev. Type: -
 Identifiers: eDoc: 520198
Other: Local-ID: C125675300671F7B-3992DB8541113439C1256A72003B9C5A-Haber:2001:PGCS
 Degree: -

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Title: Untitled Event
Place of Event: Manchester, UK
Start-/End Date: 2003-01-01 - 2003-01-01

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Source 1

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Title: The European Association for Computer Graphics 22th Annual Conference: EUROGRAPHICS 2001
Source Genre: Proceedings
 Creator(s):
Chalmers, Alan, Editor
Rhyne, Theresa-Marie, Editor
Affiliations:
-
Publ. Info: Oxford, UK : Blackwell
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: C142 - C152 Identifier: -

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Title: Computer Graphics Forum
Source Genre: Series
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Pages: - Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: ISSN: 0167-7055