Satellite hyperspectral data water body suspended matter concentration inversion method and device
A suspended matter and hyperspectral technology, which is applied in the direction of measuring devices, complex mathematical operations, and testing plant materials, can solve the problems of difficult automatic determination of the extraction threshold, narrow band of hyperspectral data, and large noise, so as to achieve automatic and accurate extraction. Effect
Pending Publication Date: 2022-05-03
自然资源部国土卫星遥感应用中心
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[0010] 1) Due to the differences between ZY1-02D satellite hyperspectral data and SeaWiFS, MODIS, MERIS and other foreign water color satellite data in terms of data quality (remote sensing reflectivity accuracy) and load indicators (band setting, spatial resolution), the existing technology directly Applied to domestic hyperspectral satellites, it is impossible to obtain better suspended matter concentration retrieval results
[0011] (2) ZY1-02D satellite hyperspectral data has a narrow band and high noise. The water body index calculated based on the hyperspectral single-band data is not effective in extracting water bodies, and the optimal extraction threshold is difficult to automatically determine. Manual judgment is required, and the range of water bodies cannot be achieved. Automatic and accurate extraction of
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[0075] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with aspects of the invention as recited in the appended claims.
[0076] figure 1 It is a flowchart of a hyperspectral satellite retrieval method for suspended matter in water according to an exemplary embodiment, as shown in figure 1 As shown, the method includes:
[0077] Step S101, calculating a normalized water index image according to the surface reflectance image;
[0078] Step S102, calculating and obtaining an initial water body mask image according...
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The invention relates to a satellite hyperspectral data water body suspended matter concentration inversion method and device, and the method comprises the steps: calculating a normalized water body index image according to a surface reflectance image; according to the normalized water body index image, calculating to obtain an initial water body mask image; performing corrosion calculation on the initial water body mask image, and counting the number of pixels to generate a target water body mask image; calculating to obtain a suspended matter concentration image according to the remote sensing reflectivity image of the hyperspectral satellite after atmospheric correction; and determining a final water body suspended matter concentration image according to the suspended matter concentration image and the target water body mask image.
Description
technical field [0001] The invention relates to the technical field of inversion of suspended matter concentration, in particular to a method and device for retrieving the concentration of suspended matter in a water body based on satellite hyperspectral data. Background technique [0002] In the related art, an assumption is made about the inherent optical properties: [0003] (1) Assume that the ratio of the backscattering of particulate matter in water to the concentration of suspended matter, that is, the specific backscattering coefficient of particulate matter, is a constant: [0004] (2) Assuming that the spatio-temporal variability of non-particulate absorption is negligible, the contribution of pure water is the absorption of non-particulate matter: a np =a w ; [0005] (3) Assume that the ratio of particulate matter absorption to TSM concentration, that is, the specific absorption coefficient of particulate matter is a constant: [0006] (4) Assume that the...
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IPC IPC(8): G01S17/89G01S7/48G01N21/55G01N21/84G06F17/10
CPCG01S17/89G01S7/48G01N21/55G01N21/84G06F17/10G01N2021/557G01N2021/8466G01N2201/12G01N2201/1215
Inventor 刘瑶朱鹏航肖晨超
Owner 自然资源部国土卫星遥感应用中心