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  Graphics Interface

Granados Velásquez, M. A., Seidel, H.-P., & Lensch, H. P. A. (2008). Graphics Interface. In C. Shaw, & L. Bartram (Eds.), Graphics Interface 2008: proceedings (pp. 33-40). New York, NY: ACM Press.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-1BD5-6 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-1BD6-4
Genre: Conference Paper

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 Creators:
Granados Velásquez, Miguel Andrés1, 2, Author              
Seidel, Hans-Peter1, Author              
Lensch, Hendrik P. A.1, Author              
Affiliations:
1Computer Graphics, MPI for Informatics, Max Planck Society, ou_40047              
2International Max Planck Research School, MPI for Informatics, Max Planck Society, ou_1116551              

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 Abstract: We address the problem of reconstructing the background of a scene from a set of photographs featuring several occluding objects. We assume that the photographs are obtained from the same viewpoint and under similar illumination conditions. Our approach is to define the background as a composite of the input photographs. Each possible composite is assigned a cost, and the resulting cost function is minimized. We penalize deviations from the following two model assumptions: background objects are stationary, and background objects are more likely to appear across the photographs. We approximate object stationariness using a motion boundary consistency term, and object likelihood using probability density estimates. The penalties are combined using an entropy-based weighting function. Furthermore, we constraint the solution space in order to avoid composites that cut through objects. The cost function is minimized using graph cuts, and the final result is composed using gradient domain fusion. We demonstrate the application of our method to the recovering of clean, unoccluded shots of crowded public places, as well as to the removal of ghosting artifacts in the reconstruction of high dynamic range images from multi-exposure sequences. Our contribution is the definition of an automatic method for consistent background estimation from multiple exposures featuring occluders, and its application to the problem of ghost removal in high dynamic range image reconstruction.

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Language(s): eng - English
 Dates: 2009-03-252008
 Publication Status: Published in print
 Pages: -
 Publishing info: New York, NY : ACM Press
 Table of Contents: -
 Rev. Method: -
 Identifiers: eDoc: 428095
DOI: http://doi.acm.org/10.1145/1375714.1375721
URI: http://www.mpi-inf.mpg.de/~granados/papers/granados08_bgestimation.pdf
Other: Local-ID: C125756E0038A185-67F1775FE220D8F7C125754B0055108E-Granados2008
 Degree: -

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Title: Untitled Event
Place of Event: Windsor, Ontario, Canada
Start-/End Date: 2008-05-28 - 2008-05-30

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Source 1

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Title: Graphics Interface 2008 : proceedings
Source Genre: Proceedings
 Creator(s):
Shaw, Chris, Editor
Bartram, Lyn, Editor
Affiliations:
-
Publ. Info: New York, NY : ACM Press
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: 33 - 40 Identifier: ISBN: 978-1-56881-423-0

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Title: ACM International Conference Proceeding Series
Source Genre: Series
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Publ. Info: -
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: -