Underwater stereo using natural flickering illumination

Yohay Swirski, Yoav Y. Schechner, Ben Herzberg, Shahriar Negahdaripour

Research output: Chapter in Book/Report/Conference proceedingConference contribution

8 Scopus citations

Abstract

Computer vision is challenged by the underwater environment. Poor visibility, geometrical distortions and nonuniform illumination typically make underwater vision less trivial than open air vision. One effect which can be rather strong in this domain is sunlight flicker. Here, submerged objects and the water volume itself are illuminated in a natural random pattern, which is spatially and temporally varying. This phenomenon has been considered mainly as a significant disturbance to vision. We show that the spatiotemporal variations of flicker can actually be beneficial to underwater vision. Specifically, flicker disambiguates stereo correspondence. This disambiguation is very simple, yet it yields accurate results. Under flickering illumination, each object point in the scene has a unique, unambiguous temporal signature. This temporal signature enables us to find dense and accurate correspondence underwater. This process may be enhanced by involving the spatial variability of the flicker field in the solution. The method is demonstrated underwater by in-situ experiments. This method may be useful to a wide range of shallow underwater applications.

Original languageEnglish (US)
Title of host publicationMTS/IEEE Seattle, OCEANS 2010
DOIs
StatePublished - Dec 1 2010
EventMTS/IEEE Seattle, OCEANS 2010 - Seattle, WA, United States
Duration: Sep 20 2010Sep 23 2010

Publication series

NameMTS/IEEE Seattle, OCEANS 2010

Other

OtherMTS/IEEE Seattle, OCEANS 2010
CountryUnited States
CitySeattle, WA
Period9/20/109/23/10

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Ocean Engineering

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    Swirski, Y., Schechner, Y. Y., Herzberg, B., & Negahdaripour, S. (2010). Underwater stereo using natural flickering illumination. In MTS/IEEE Seattle, OCEANS 2010 [5664275] (MTS/IEEE Seattle, OCEANS 2010). https://doi.org/10.1109/OCEANS.2010.5664275