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Method for conducting inland water body atmospheric correction based on oxygen and water-vapor absorption wavebands

A technique for atmospheric correction and water vapor absorption, which is applied in the field of remote sensing and can solve problems such as increased water reflection.

Inactive Publication Date: 2014-01-08
李云梅
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Problems solved by technology

However, due to the high turbidity of the inland water body, the reflection of the water body in the near-infrared band increases, making the assumption that the near-infrared water radiance is approximately 0 no longer valid, so this method cannot be directly applied to inland and coastal regions. Class II water body

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  • Method for conducting inland water body atmospheric correction based on oxygen and water-vapor absorption wavebands
  • Method for conducting inland water body atmospheric correction based on oxygen and water-vapor absorption wavebands
  • Method for conducting inland water body atmospheric correction based on oxygen and water-vapor absorption wavebands

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[0055] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0056]This embodiment takes Taihu Lake as an example of an inland water body and MERIS data as an example of a hyperspectral remote sensing image to describe in detail the process of using the method for atmospheric correction of an inland water body. figure 1 It is a flowchart of a method for atmospheric correction of hyperspectral images based on oxygen and water vapor absorption bands described in an embodiment of the present invention, as shown in figure 1 Said, said method comprises the steps of:

[0057] A: The MERIS image data of November 11, 2007, November 20, 2008, and April 25, 2009 were obtained through the website;

[0058] B: Extracting clean pixels (dark pi...

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Abstract

The invention discloses a method for conducting inland water body atmospheric correction based on oxygen and water-vapor absorption wavebands, and relates to the technical field of remote sensing. The method comprises the steps of processing hyperspectral remote sensing image data of an inland water body, extracting a clean water body image element (dark image element), conducting the rayleigh scattering removal and atmospheric correction on the extracted dark image element, utilizing the oxygen and water-vapor absorption wavebands for combinatorially computing atmospheric correction factors on the corrected image element, conducting aerosol scattering of extrapolation full-wave bands, and utilizing the calculated aerosol scattering value for conducting the atmospheric correction on a whole-scene image. According to the method, the characteristic that the water body is low in reflectivity at the oxygen and water-vapor absorption wavebands is utilized, the water body dark image element is selected, the aerosol scattering is calculated, the phenomenon that due to the fact that in the inland water body atmospheric correction, the water body is high in turbidity, overcorrection is caused is avoided, the precision of the inland turbid water body atmospheric correction is improved, and the technical support is provided for improving the precision of remote sensing retrieval.

Description

technical field [0001] The invention relates to the technical field of remote sensing, in particular to a method for atmospheric correction of inland water bodies based on oxygen and water vapor absorption bands for hyperspectral data. Background technique [0002] In water color remote sensing, more than 90% of the signals received by the sensor at the top of the atmosphere come from atmospheric scattering, while the water body information only accounts for 10% in the visible light range. Atmospheric scattering information has caused great interference to the water body spectral information. Seriously affected the remote sensing extraction of water environment parameters. Therefore, to improve the accuracy of water environment remote sensing monitoring, accurate atmospheric correction must be carried out. Atmospheric scattering is composed of atmospheric molecular scattering (Rayleigh scattering) and aerosol scattering. Since the composition and content of atmospheric mole...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/497
CPCG01J5/00G01N21/17G01N2021/1795G01J5/804
Inventor 李云梅王桥朱利檀静
Owner 李云梅
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