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High-spectrum remote-sensing mineral content quantitative inversion method

A hyperspectral remote sensing and mineral content technology, which is applied in the field of identifying mineral content, can solve the problems of low precision and quantification of identification results, and inability to invert mineral content.

Inactive Publication Date: 2009-10-07
CHINA AERO GEOPHYSICAL SURVEY & REMOTE SENSING CENT FOR LAND & RESOURCES
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Problems solved by technology

[0007] The purpose of the present invention is to propose a quantitative inversion method for mineral content, which can not only identify mineral Types of minerals can also be identified

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Embodiment Construction

[0034] The present invention is now applied to the HyMap data of the Tudun copper-nickel mining area in East Tianshan, Xinjiang, and the distribution of six minerals including sericite, calcite, chlorite, epidote, talc (or tremolite) and serpentine has been inverted.

[0035]Taking the variation of the spectrum of a muscovite-enriched area with terrain as an example, due to the different illuminance caused by the terrain, the reflectance of the sunny side in the muscovite-enriched area is significantly greater than that of the back side, and the spectral absorption characteristic depth of the sunny side is stronger than that of the back side. sunny side. Obviously, the reflectance spectrum, especially the reflectance value, contains more information such as terrain and sunlight, and the mineral content information becomes secondary information instead, and the mineral content information cannot be obtained directly by spectral decomposition. After the continuum is removed, the...

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Abstract

The invention provides a high-spectrum remote-sensing mineral content quantitative inversion method, based on spectrum linear resolution. Before linear resolution, the end-member spectrum and high-spectrum data are subjected to continuum removing treatment to eliminate the effect of the landform, solar illumination on the spectrum; during linear resolution, the end-members with wave band of 1 are added into the end-member spectrum for representing the mineral end-members without obvious absorptive character in all the spectrum decomposition wave-band range and the end-member spectrum without absorptive character is subjected to continuum removing treatment and then represented using the end-members with wave band of 1; after linear resolution, a modifier formula is brought forward direct towards the effect of the non-linear mixture of the mineral spectrum on the mineral content inversion result, the formula corrects the mineral content subjected to spectrum linear resolution and inversion to make the inversed mineral content more closed to the accurate content. The mineral mixed test shows that: the correction formula can be reduced the error of the mineral content inversion. The test data shows that: the mineral content inversion average error which is not corrected is 29.8% and after being corrected, the average error is reduced to 4.5%.

Description

technical field [0001] The invention relates to a method for identifying mineral information based on hyperspectral remote sensing data, especially for identifying mineral content. Background technique [0002] Hyperspectral remote sensing has the characteristics of map-spectrum integration, and can identify mineral information based on the fine spectral characteristics of minerals. At present, there are two main methods for hyperspectral remote sensing mineral identification—identification methods based on spectral expert knowledge and identification methods based on spectral similarity algorithms. The basic idea of ​​the former is to integrate the knowledge of various spectral experts (spectral absorption characteristic position, symmetry, depth, area, etc.), and establish a decision tree for mineral identification to complete the identification of minerals. The representative method is "hyperspectral mineral layering". Pedigree identification method" (has obtained a nati...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V8/10G01N21/31
Inventor 闫柏琨王润生杨苏明
Owner CHINA AERO GEOPHYSICAL SURVEY & REMOTE SENSING CENT FOR LAND & RESOURCES
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