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    Modeling and Synthesis of Aperture Effects in Cameras

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    081-088.pdf (360.8Kb)
    Date
    2008
    Author
    Lanman, Douglas
    Raskar, Ramesh
    Taubin, Gabriel
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    Abstract
    In this paper we describe the capture, analysis, and synthesis of optical vignetting in conventional cameras. We analyze the spatially-varying point spread function (PSF) to accurately model the vignetting for any given focus or aperture setting. In contrast to existing "flat-field" calibration procedures, we propose a simple calibration pattern consisting of a two-dimensional array of point light sources - allowing simultaneous estimation of vignetting correction tables and spatially-varying blur kernels. We demonstrate the accuracy of our model by deblurring images with focus and aperture settings not sampled during calibration. We also introduce the Bokeh Brush: a novel, post-capture method for full-resolution control of the shape of out-of-focus points. This effect is achieved by collecting a small set of images with varying basis aperture shapes. We demonstrate the effectiveness of this approach for a variety of scenes and aperture sets.
    BibTeX
    @inproceedings {10.2312:COMPAESTH:COMPAESTH08:081-088,
    booktitle = {Computational Aesthetics in Graphics, Visualization, and Imaging},
    editor = {Douglas W. Cunningham and Victoria Interrante and Paul Brown and Jon McCormack},
    title = {{Modeling and Synthesis of Aperture Effects in Cameras}},
    author = {Lanman, Douglas and Raskar, Ramesh and Taubin, Gabriel},
    year = {2008},
    publisher = {The Eurographics Association},
    ISSN = {1816-0859},
    ISBN = {978-3-905674-08-8},
    DOI = {10.2312/COMPAESTH/COMPAESTH08/081-088}
    }
    URI
    http://dx.doi.org/10.2312/COMPAESTH/COMPAESTH08/081-088
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    Eurographics Association copyright © 2013 - 2022 
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    Theme by @mire NV
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