Automatic Sun Glint Removal of Multispectral High-Resolution Worldview-2 Imagery for Retrieving Coastal Shallow Water Parameters

Remote Sensing

Javier Martin¹  Francisco Eugenio²  Javier Marcello²  Anabella Medina²  Deepak R. Mishra²  Richard W. Gould² 

[1]Instituto Oceanografía y Cambio Global, Universidad de Las Palmas de G.C., Campus Universitario de Tafira, Las Palmas de G.C. 35017, Spain

关键词: high resolution;    Worldview-2;    atmospheric 6S model;    sun glint;    shallow water;    radiative transfer modeling;   

DOI  :  10.3390/rs8010037

来源: mdpi

【 摘 要 】

Remote sensing of coastal areas requires multispectral satellite images with a high spatial resolution. In this sense, WorldView-2 is a very high resolution satellite, which provides an advanced multispectral sensor with eight narrow bands, allowing the proliferation of new environmental monitoring and mapping applications in shallow coastal ecosystems. These challenges need the accurate determination of the water radiance, which is not often valued compared to other sources such as atmosphere and specular water reflection (sun glint). In this context, the atmospheric correction and the glinting removal have demonstrated to be critical steps in the preprocessing chain of high resolution images. In this work, the Second Simulation of a Satellite Signal in the Solar Spectrum (6S) is used to compensate the atmospheric effects and to compute part of the deglinting algorithm using the modeled direct normalized irradiance. This paper describes a novel automatic deglinting procedure, integrated in the Radiative Transfer Modeling (RTM) inversion of the shallow water environments, which allows computing the water Inherent Optical Properties (IOPs), bathymetry and seafloor albedo contributions. The proposed methodology has demonstrated a proper performance for environmental monitoring in shallow water areas.

【 授权许可】

CC BY   
© 2016 by the authors; licensee MDPI, Basel, Switzerland.