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Atmospheric correction system and method for multispectral remote sensing images based on reference spectrum matching

A technique for atmospheric correction and reference spectrum, applied in spectrometry/spectrophotometry/monochromator, image enhancement, spectrum survey, etc., can solve problems such as inapplicability, lack of large area of ​​dense vegetation, etc., and achieve good results Effect

Active Publication Date: 2021-06-29
CHINA CENT FOR RESOURCES SATELLITE DATA & APPL
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Problems solved by technology

However, in the northern urban areas of my country, there is a lack of large areas of dense vegetation, especially in winter, the dark pixel method and the improved dark pixel method are not applicable in northern urban areas

Method used

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  • Atmospheric correction system and method for multispectral remote sensing images based on reference spectrum matching
  • Atmospheric correction system and method for multispectral remote sensing images based on reference spectrum matching
  • Atmospheric correction system and method for multispectral remote sensing images based on reference spectrum matching

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Embodiment Construction

[0055] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0056] Such as figure 1 Shown is the flow chart of the method for atmospheric correction of multispectral remote sensing images based on reference spectrum matching in the present invention. The method for atmospheric correction of multispectral remote sensing images based on reference spectrum matching in the present invention specifically includes the following steps:

[0057] Step 1. Obtain multi-spectral remote sensing images of urban areas, manually extract images of flat and uniform stable targets fixed on the ground (such as artificial targets such as concrete roads, squares or airports, etc., the airport is taken as an example below), and calculate the average gray value of the stable targets. degree value. According to the apparent radiance scaling coefficient, the average gray value of the airport is converted into the average apparen...

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Abstract

The present invention relates to a multi-spectral remote sensing image atmospheric correction system and method based on reference spectrum matching. The method breaks through the shortcomings of existing methods that can only be applied to areas with dense vegetation. According to the characteristics of multiple stable and unchanging objects in urban areas, Assuming that ground objects in different time periods in different regions have similar spectral characteristics, through spectral matching technology, the similarity between the surface reflectance and the reference spectrum under different aerosol optical thicknesses is established, and finally the aerosol retrieval of multispectral images and Atmospheric correction does not require multi-temporal satellite images. It is suitable for all kinds of weather and various cities throughout the year, and can realize atmospheric correction of a single multispectral image.

Description

technical field [0001] The invention relates to a multispectral remote sensing image atmospheric correction system and method based on reference spectrum matching, and belongs to the technical field of spectral remote sensing atmospheric correction. Background technique [0002] With the continuous development of remote sensing theory and technology, remote sensing has gradually moved from qualitative application to quantitative application. Quantification of remote sensing is an important development trend of remote sensing applications. The key is to establish the quantitative relationship between sensors, the atmosphere and the surface, and to realize the quantitative detection of various ground object attributes related to electromagnetic wave radiation. The premise of remote sensing quantification is sensor calibration and atmospheric correction of remote sensing data. The atmosphere not only causes problems such as blurring of remote sensing images, decreased contrast...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00G01J3/28
CPCG01J3/2823G01J2003/2826G01J2003/2873G06T2207/10036G06T2207/30192G06T5/80
Inventor 刘李高海亮闵祥军胡新凯程天海潘志强
Owner CHINA CENT FOR RESOURCES SATELLITE DATA & APPL
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