Method and device for extracting hyperspectral remote sensing altered mineral information

A technology of hyperspectral remote sensing and altered minerals, which is applied in the field of hyperspectral remote sensing altered mineral information extraction, can solve the problem of high spectral resolution data redundancy, and achieve the effect of ensuring accuracy and accurate correlation

Pending Publication Date: 2021-11-19
中国人民武装警察部队黄金第五支队
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  • Abstract
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Problems solved by technology

Moreover, the high spectral resolution of hyperspectral remote sensing data has high data redundancy, and it cannot well mine the sparse alteration mineral information submerged in the background rock-forming mineral spectrum and noise from the highly redundant hyperspectral data volume.

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  • Method and device for extracting hyperspectral remote sensing altered mineral information
  • Method and device for extracting hyperspectral remote sensing altered mineral information
  • Method and device for extracting hyperspectral remote sensing altered mineral information

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Embodiment 1

[0070] refer to figure 1 , the methods of hyperspectral remote sensing alteration mineral information extraction include:

[0071] S000: Obtain hyperspectral image data.

[0072] Specifically, combining figure 2 , step S000 includes the following sub-steps:

[0073] S001: Obtain hyperspectral remote sensing data.

[0074] Based on the electromagnetic wave sensor carried by the UAV, the aerial photography of the environment forms hyperspectral remote sensing data, and then transmits it to the ground control base station, and then transmits or copies it to the device memory through the ground control base station, or directly communicates with the UAV controller system through the processor get.

[0075] S002: data preprocessing.

[0076] Among them, data preprocessing refers to the preprocessing of hyperspectral remote sensing data including radiometric calibration and atmospheric correction, and obtains the ground reflectance (or specific emissivity) hyperspectral image ...

Embodiment 2

[0114] refer to Figure 5 , the difference between this embodiment and embodiment 1 is that the low-rank matrix L is obtained t and sparse matrix S t The constraints are different.

[0115] S700: Obtain the information proportion of the noise component.

[0116] Including: preset error tolerance coefficient ε, in the low-rank matrix L t and sparse matrix S t After the loop iteration, the information proportion of the noise component in the decomposition of the two-dimensional matrix X is obtained, namely ,in Represents the square of the Frobenius norm of the two-dimensional matrix X, since X=L+S+N, so Represents the square of the Frobenius norm of the noise matrix N after matrix factorization.

[0117] S800: Determine the information proportion of the noise component and the size of the error tolerance coefficient.

[0118] include: when Stop the loop iteration at this time, which means that L+S can reconstruct the information of X losslessly, otherwise, it means ...

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Abstract

The invention relates to a method and a device for extracting hyperspectral remote sensing altered mineral information. The method comprises the following steps of acquiring hyperspectral remote sensing data and preprocessing the hyperspectral remote sensing data to obtain hyperspectral image data, performing dimension reduction on the hyperspectral image data to obtain a two-dimensional matrix, decomposing the two-dimensional matrix into a low-rank matrix, a sparse matrix and a noise matrix, obtaining a standard wave spectrum of the to-be-identified mineral, and re-sampling the standard wave spectrum of the to-be-identified mineral, carrying out envelope line removal processing on the resampled standard spectrum of the to-be-identified mineral, and obtaining a spectrum vector with enhanced diagnosis spectrum characteristics, obtaining a vector product and an Euclidean distance according to a row vector of the sparse matrix and a wave spectrum vector with enhanced diagnosis wave spectrum features, and taking the product of the vector product and the Euclidean distance as an information value of the altered mineral, and extracting the altered mineral based on a threshold value. The method has the effect of mining sparse alteration mineral information submerged in background rock forming mineral spectrum and noise from a highly redundant hyperspectral data body.

Description

technical field [0001] The present application relates to the field of remote sensing geological survey, in particular to a method and device for extracting altered mineral information by hyperspectral remote sensing. Background technique [0002] Hyperspectral remote sensing data contains rich spatial, radiometric and spectral triple information, and has the characteristics of map-spectrum integration. It can quantitatively and accurately extract geological mineralization and alteration mineral information, and has played an important role in the field of remote sensing geological survey. The current hyperspectral remote sensing alteration mineral information extraction mainly uses spectral angle, hybrid demodulation filter, hourglass method and other means to perform spectral full-band matching or spectral matching of partial continuous bands. [0003] Since the spectrum of a single pixel is the product of multiple mineral spectra of different abundances and noise coupling...

Claims

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Application Information

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IPC IPC(8): G01N21/31G01N21/17G01N21/01
CPCG01N21/31G01N21/17G01N21/01G01N2021/1793G01N2021/0112
Inventor 李士杰王博何海洋李云昊高永宝魏立勇
Owner 中国人民武装警察部队黄金第五支队
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