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Het OWA, het open archief van het Waterbouwkundig Laboratorium heeft tot doel alle vrij toegankelijke onderzoeksresultaten van dit instituut in digitale vorm aan te bieden. Op die manier wil het de zichtbaarheid, verspreiding en gebruik van deze onderzoeksresultaten, alsook de wetenschappelijke communicatie maximaal bevorderen.

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one publication added to basket [366388]

Turbid water sun glint removal for high resolution sensors without SWIR Lavigne, H.; Vanhellemont, Q.; Ruddick, K.; Vansteenwegen, D. (2023). Turbid water sun glint removal for high resolution sensors without SWIR, in: Bostater, C.R. et al. Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions, 2023, 3 - 6 September 2023, Amsterdam, Netherlands. Proceedings of SPIE, the International Society for Optical Engineering, : pp. 1272804 In: Bostater, C.R.; Neyt, X. (Ed.) (2023). Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions, 2023, 3 - 6 September 2023, Amsterdam, Netherlands. Proceedings of SPIE, the International Society for Optical Engineering. SPIE: Bellingham. , meer In: Proceedings of SPIE, the International Society for Optical Engineering. SPIE: Bellingham, WA. ISSN 0277-786X; e-ISSN 1996-756X, meer

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Beschikbaar in	Auteurs | Datasets
VLIZ: Open access 391898 [ download pdf ]
Documenttype: Congresbijdrage

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Trefwoord

Marien/Kust

Author keywords

sun glint, Pléiades, water reflectance, ocean colour, turbid waters

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Auteurs		Top | Datasets
Lavigne, H., meer Vanhellemont, Q., meer Ruddick, K., meer Vansteenwegen, D., meer

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Abstract

The loss of satellite data over water because of sun glint contamination represents a high cost financially and scientifically. Although many glint removal algorithms have been developed, glint contamination can remain problematic, especially in turbid waters. In the present study, we propose a correction for sun glint in turbid waters in the absence of SWIR bands. This method could for example be applied to imagery from the Pléiades and Planetscope constellations. Our method has been developed and tested using (1) in situ multi-angle measurements of surface reflectance collected with a PANTHYR autonomous hyperspectral radiometer deployed near Ostend, and (2) a set of metre-scale Pléiades stereo imagery taken in the Belgian coastal zone, with one image of the stereo pair looking into the sun glint and one looking away from the sun glint. The method uses combinations of spectral bands for which a linear relationship is observed in water reflectance, and a constant band ratio for glint reflectance directly calculated from the glinted image. To be adapted to a high range of turbidity conditions, a switching approach between band combinations is used. Glint removal correction was successfully applied in association with the ACOLITE Dark Spectrum Fitting (DSF) atmospheric correction. Results show a good performance in terms of glint removal, and the average overestimation is reduced to less than 20 % in visible bands.

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Datasets (2)

Vansteenwegen, D.; Vanhellemont, Q.; Flanders Marine Institute (VLIZ): Belgium; Royal Belgian Institute for Natural Sciences (RBINS): Belgium; (2024): PANTHYR hyperspectral water radiometry Blue Accelerator Platform 2022. Marine Data Archive., meer Vansteenwegen, D.; Vanhellemont, Q.; Flanders Marine Institute (VLIZ): Belgium; Royal Belgian Institute for Natural Sciences (RBINS): Belgium; (2024): PANTHYR hyperspectral water radiometry Blue Accelerator Platform 2023. Marine Data Archive., meer

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