Reinterpretable Imager: Towards Variable Post-Capture Space, Angle and Time Resolution in Photography
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Raskar_Reinterpretable Imager.pdf
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1.07 MB
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Author(s)
Agrawal, Amit
Veeraraghavan, Ashok
Raskar, Ramesh
Date Issued
June 2010
Journal
Computer Graphics Forum
Publisher
John Wiley & Sons, Inc.
Citation
Agrawal, Amit, Ashok Veeraraghavan, and Ramesh Raskar. “Reinterpretable Imager: Towards Variable Post-Capture Space, Angle and Time Resolution in Photography.” Computer Graphics Forum 29 (2010): 763-772. Web. 28 Oct. 2011.
Version
Final published version
Abstract
We describe a novel multiplexing approach to achieve tradeoffs in space, angle and time resolution in photography. We explore the problem of mapping useful subsets of time-varying 4D lightfields in a single snapshot. Our design is based on using a dynamic mask in the aperture and a static mask close to the sensor. The key idea is to exploit scene-specific redundancy along spatial, angular and temporal dimensions and to provide a programmable or variable resolution tradeoff among these dimensions. This allows a user to reinterpret the single captured photo as either a high spatial resolution image, a refocusable image stack or a video for different parts of the scene in post-processing.
A lightfield camera or a video camera forces a-priori choice in space-angle-time resolution. We demonstrate a single prototype which provides flexible post-capture abilities not possible using either a single-shot lightfield camera or a multi-frame video camera. We show several novel results including digital refocusing on objects moving in depth and capturing multiple facial expressions in a single photo.
MIT Department
Massachusetts Institute of Technology. Media Laboratory
Program in Media Arts and Sciences (Massachusetts Institute of Technology)
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1111/j.1467-8659.2009.01646.x
