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Atmospheric correction processing method for satellite-borne multispectral cameras

A technology for atmospheric correction and processing methods, which is applied in image data processing, instrumentation, calculation, etc., and can solve the problems of calculating aerosol optical depth, lack of short-wave infrared data, etc.

Active Publication Date: 2016-01-20
CHINA CENT FOR RESOURCES SATELLITE DATA & APPL
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Problems solved by technology

[0006] The problem solved by the technology of the present invention is: aiming at the deficiencies of the prior art, a multi-spectral atmospheric correction method for space-borne cameras is provided. For the defect of aerosol optical depth, by establishing the calculation model of satellite multi-spectral data atmospheric correction and using parameters such as aerosol optical thickness to calculate the surface reflectance, the high-precision atmospheric correction processing of in-orbit satellite data is realized, and the calculation efficiency is improved.

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Embodiment Construction

[0059] Specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0060] like figure 1 Described, the atmospheric correction processing method of a kind of space-borne multispectral camera of the present invention comprises steps as follows:

[0061] (1) Calculate the apparent radiance:

[0062] L=Gain×DN+Bias(1)

[0063] Among them, L is the apparent radiance; Gain and Bias are the gain and bias of the spaceborne camera; DN is the gray value of the image;

[0064] (2) Establish atmospheric correction calculation model:

[0065] L = L 0 + ρ 1 - s ρ TF d π - - - ( 2 )

[006...

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Abstract

The invention discloses an atmospheric correction processing method for satellite-borne multispectral cameras, comprising the steps of calculating the apparent radiance, building an atmospheric correction calculation model, measuring and calculating the aerosol optical thickness, and carrying out atmospheric correction fast calculation. According to the invention, the aerosol optical thickness of the area is measured accurately to obtain a high-accuracy aerosol optical thickness parameter, atmospheric correction of satellite-borne cameras is realized, the influence of atmosphere on remote sensing satellite images is eliminated, and the surface reflectivity information in satellite images is enhanced.

Description

technical field [0001] The invention relates to a method for multi-spectral atmospheric correction of a space-borne camera, which can realize the production of surface reflectance of the space-borne camera and is suitable for real-time atmospheric correction processing of the space-borne camera. Background technique [0002] ZY-3 satellite (hereinafter referred to as ZY-3 satellite) is my country's first high-resolution surveying and mapping satellite, which can obtain multispectral data (MUX, 5.8 meters). The specific parameters of the payload are shown in Table 1. The high-resolution multispectral data of the ZY-3 satellite are widely used in resource investigation and monitoring, providing dynamic information services for disaster prevention and mitigation, agriculture, forestry and water conservancy, environmental protection, urban planning and construction, transportation, and major national projects. Carrying out the atmospheric correction of ZY-3 satellite data and ev...

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Application Information

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IPC IPC(8): G06T7/00
CPCG06T2207/10032
Inventor 杨磊傅俏燕张学文隋正伟高青山
Owner CHINA CENT FOR RESOURCES SATELLITE DATA & APPL
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