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An evaluation of waveband pairs for water column correction using band ratio methods for seabed mapping in the Seychelles

Journal Article


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Abstract


  • The differential attenuation of visible light (wavelength 400–700 nm) as it travels

    through the water column confounds the interpretation of remotely sensed imagery

    acquired over the sea floor. This can be addressed using depth-invariant processing

    techniques that ratio the radiance values of two wavebands. An evaluation of

    the performance of different waveband pairs for creating depth-invariant indices of

    the sea floor is presented. Twenty-eight different band pairs extracted from multispectral

    Compact Airborne Spectrographic Imager (CASI) data are assessed for

    the creation of depth-invariant indices over the reef profile of Alphonse Atoll in

    the Seychelles (water depth 0–30 m). Findings indicate that, for optimal performance,

    bands selected for depth-invariant processing must be at least 90 nm apart

    to achieve an optimal ratio of attenuation coefficients within the water column.

    This optimal ratio must also lie at a central point of the visible spectrum at which

    longer wavelength bands are not fully attenuated, while shorter wavelength bands

    exhibit some attenuation over a depth range that coincides with the features of

    interest in the water column.

Publication Date


  • 2011

Citation


  • Hamylton, S. (2011). An evaluation of waveband pairs for water column correction using band ratio methods for seabed mapping in the Seychelles. International Journal of Remote Sensing, 32 (24), 9185-9195.

Scopus Eid


  • 2-s2.0-82155171382

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2046&context=scipapers

Ro Metadata Url


  • http://ro.uow.edu.au/scipapers/1006

Number Of Pages


  • 10

Start Page


  • 9185

End Page


  • 9195

Volume


  • 32

Issue


  • 24

Abstract


  • The differential attenuation of visible light (wavelength 400–700 nm) as it travels

    through the water column confounds the interpretation of remotely sensed imagery

    acquired over the sea floor. This can be addressed using depth-invariant processing

    techniques that ratio the radiance values of two wavebands. An evaluation of

    the performance of different waveband pairs for creating depth-invariant indices of

    the sea floor is presented. Twenty-eight different band pairs extracted from multispectral

    Compact Airborne Spectrographic Imager (CASI) data are assessed for

    the creation of depth-invariant indices over the reef profile of Alphonse Atoll in

    the Seychelles (water depth 0–30 m). Findings indicate that, for optimal performance,

    bands selected for depth-invariant processing must be at least 90 nm apart

    to achieve an optimal ratio of attenuation coefficients within the water column.

    This optimal ratio must also lie at a central point of the visible spectrum at which

    longer wavelength bands are not fully attenuated, while shorter wavelength bands

    exhibit some attenuation over a depth range that coincides with the features of

    interest in the water column.

Publication Date


  • 2011

Citation


  • Hamylton, S. (2011). An evaluation of waveband pairs for water column correction using band ratio methods for seabed mapping in the Seychelles. International Journal of Remote Sensing, 32 (24), 9185-9195.

Scopus Eid


  • 2-s2.0-82155171382

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2046&context=scipapers

Ro Metadata Url


  • http://ro.uow.edu.au/scipapers/1006

Number Of Pages


  • 10

Start Page


  • 9185

End Page


  • 9195

Volume


  • 32

Issue


  • 24