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    Relighting Human Locomotion with Flowed Reflectance Fields

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    183-194.pdf (456.2Kb)
    Date
    2006
    Author
    Einarsson, Per
    Chabert, Charles-Felix
    Jones, Andrew
    Ma, Wan-Chun
    Lamond, Bruce
    Hawkins, Tim
    Bolas, Mark
    Sylwan, Sebastian
    Debevec, Paul
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    Abstract
    We present an image-based approach for capturing the appearance of a walking or running person so they can be rendered realistically under variable viewpoint and illumination. In our approach, a person walks on a treadmill at a regular rate as a turntable slowly rotates the person s direction. As this happens, the person is filmed with a vertical array of high-speed cameras under a time-multiplexed lighting basis, acquiring a seven-dimensional dataset of the person under variable time, illumination, and viewing direction in approximately forty seconds. We process this data into a flowed reflectance field using an optical flow algorithm to correspond pixels in neighboring camera views and time samples to each other, and we use image compression to reduce the size of this data.We then use image-based relighting and a hardware-accelerated combination of view morphing and light field rendering to render the subject under user-specified viewpoint and lighting conditions. To composite the person into a scene, we use an alpha channel derived from back lighting and a retroreflective treadmill surface and a visual hull process to render the shadows the person would cast onto the ground. We demonstrate realistic composites of several subjects into real and virtual environments using our technique.
    BibTeX
    @inproceedings {10.2312:EGWR:EGSR06:183-194,
    booktitle = {Symposium on Rendering},
    editor = {Tomas Akenine-Moeller and Wolfgang Heidrich},
    title = {{Relighting Human Locomotion with Flowed Reflectance Fields}},
    author = {Einarsson, Per and Chabert, Charles-Felix and Jones, Andrew and Ma, Wan-Chun and Lamond, Bruce and Hawkins, Tim and Bolas, Mark and Sylwan, Sebastian and Debevec, Paul},
    year = {2006},
    publisher = {The Eurographics Association},
    ISSN = {1727-3463},
    ISBN = {3-905673-35-5},
    DOI = {10.2312/EGWR/EGSR06/183-194}
    }
    URI
    http://dx.doi.org/10.2312/EGWR/EGSR06/183-194
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    Eurographics Association copyright © 2013 - 2023 
    Send Feedback | Contact - Imprint | Data Privacy Policy | Disable Google Analytics
    Theme by @mire NV
    System hosted at  Graz University of Technology.
    TUGFhA