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Hyperspectral image processing method for dolomite information extraction

A technology of information extraction and image processing, which is applied in image data processing, image enhancement, instruments, etc., can solve the problems of long processing time, large amount of data, and many manual operation steps, so as to improve the operation speed, reduce the amount of data, reduce interference effect

Active Publication Date: 2014-07-02
BEIJING RES INST OF URANIUM GEOLOGY
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AI Technical Summary

Problems solved by technology

[0002] The current method of extracting dolomite information from hyperspectral remote sensing images is mainly spectral matching of full-band or partial continuous-band spectral matching. These methods are easily affected by the spectrum or noise of other ground objects in the process of extracting dolomite information, and the accuracy of information extraction is relatively low
Secondly, the existing spectrum extraction method has many manual steps, which increases the error of human judgment.
The third is that the hyperspectral data has many bands and a large amount of data. The existing methods take a long time to process, which reduces the speed of data processing and the scale of application.

Method used

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Embodiment Construction

[0014] The invention calculates the abundance values ​​of dolomite in different regions within the image range by resampling hyperspectral images, extracting specific bands, and performing a series of judgments and calculations.

[0015] Specifically include the following steps:

[0016] The first step is to obtain hyperspectral images; preprocess hyperspectral images, perform atmospheric correction, and obtain image data of ground reflectance;

[0017] The second step is to resample the image data of ground reflectance, and extract images with wavelength bands at 1820nm, 1985nm, 2015nm, 2195nm, 2315nm, 2380nm, and 2420nm;

[0018] In the third step, when the pixel value of the 1820nm band image is greater than the corresponding pixel value of the 1985nm band image, it is judged that the pixel satisfies condition 1; obtain the result image H1 of subtracting the 1985nm band image from the 1820nm band image;

[0019] In the fourth step, when the pixel value of the 1985nm band i...

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Abstract

The invention relates to a hyperspectral image processing method for dolomite information extraction. Wavebands of dolomite having obvious spectral features are reserved, images of the wavebands at 1820nm, 1985nm, 2015nm, 2195nm, 2315nm, 2380nm and 2420nm are extracted, and a series of judgment and calculation is performed to calculate the abundance value of the dolomite in different regions in the image range. According to the method, other wavebands of the features are not obvious can be removed so as to highlight the spectral features of the dolomite in the information extraction process, reduce the influences of other objects or noise and reduce the volume of processed data, and the purpose of realizing dolomite information extraction with less manual operation can be realized through an IDL program, and the accuracy and speed of dolomite information extraction can be improved.

Description

technical field [0001] The invention relates to a hyperspectral image processing method for dolomite information extraction, in particular to a hyperspectral image for dolomite information extraction that reduces the influence of other ground objects or noise, manual operation steps, and processing data volume Approach. Background technique [0002] The current method of extracting dolomite information from hyperspectral remote sensing images is mainly spectral matching of full-band or partial continuous-band spectral matching. These methods are easily affected by the spectrum or noise of other ground objects in the process of information extraction of dolomite, and the accuracy of information extraction is relatively low. Secondly, the existing spectrum extraction method has many manual steps, which increases the error of human judgment. The third is that hyperspectral data has many bands and a large amount of data. The existing methods take a long time to process, which ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00
Inventor 杨燕杰赵英俊
Owner BEIJING RES INST OF URANIUM GEOLOGY
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