Night beats with alternating current (AC) illumination. By passively
sensing this beat, we reveal new scene information which includes:
the type of bulbs in the scene, the phases of the electric grid up to
city scale, and the light transport matrix. This information yields
unmixing of reflections and semi-reflections, nocturnal high dynamic
range, and scene rendering with bulbs not observed during acquisition.
The latter is facilitated by a database of bulb response functions for
a range of sources, which we collected and provide. To do all this,
we built a novel coded- exposure high-dynamic-range imaging technique,
specifically designed to operate on the grid’s AC lighting.
People
Mark Sheinin (Technion-Israel Institute of Technology)
Yoav Schechner
(Technion-Israel Institute of Technology)
The DELIGHT Database of Bulb Response Functions ZIP
(98.2MB)
Acknowledgements
This work
was supported in part by the Natural Sciences and Engineering Research
Council of Canada under the RGPIN and SGP programs, by the Mitacs Canada
Israel Globalink Innovation Initiative, by DARPA under the REVEAL
program, by the Israel Science Foundation and by the Taub Foundation.
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2017
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