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Hyperspectral Image Unmixing Method Based on Differential Search

A hyperspectral image and differential technology, which is applied in the field of hyperspectral remote sensing and can solve problems such as hyperspectral image unmixing

Inactive Publication Date: 2019-04-05
TIANJIN UNIV OF COMMERCE
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The present invention solves the problem of hyperspectral image unmixing under the framework of blind signal separation

Method used

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  • Hyperspectral Image Unmixing Method Based on Differential Search
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  • Hyperspectral Image Unmixing Method Based on Differential Search

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Embodiment Construction

[0043] Below in conjunction with accompanying drawing, the present invention is described further.

[0044] The present invention uses mutual information as a measure of independence, and its calculation method is

[0045]

[0046] Among them, the value range of I(Y) is [0, ∞), and when it is 0, it means that the variables are independent of each other.

[0047] The abundance constraint item is non-negative according to the proportion of each end member in the pixel. Based on this, in the linear mixed model, the objective function defining the abundance non-negative constraint is

[0048]

[0049] Wherein, n is a positive integer, taking n=1; Indicates all negative elements in the abundance estimation matrix y. When all elements in y are non-negative, then f ANC (Y)=0. So by minimizing f ANC (Y), to achieve the abundance non-negative property.

[0050] In a hyperspectral image, the sum of the abundance values ​​of each endmember at each pixel must be one. Based ...

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Abstract

The invention discloses a hyperspectral image unmixing method based on differential search. The present invention constructs corresponding constraint items according to the characteristics of non-negative abundance and abundance sum of hyperspectral image, combines with mutual information as an objective function, and uses differential search method to optimize and solve the objective function to realize hyperspectral image solution mix. The invention plays an important role in the fields of monitoring ecological environment, disaster prediction, resource exploration, crop yield estimation, vegetation classification, satellite reconnaissance in military affairs, target detection and the like.

Description

technical field [0001] The invention relates to the field of hyperspectral remote sensing, in particular to a hyperspectral image unmixing method based on differential search. Background technique [0002] Remote sensing images have gone through the stages of panchromatic (black and white), color, and multispectral imaging. After the emergence of spectral imagers in the 1980s, they entered the stage of hyperspectral remote sensing. The imaging spectrometer obtains images by reflecting or emitting electromagnetic waves of different wavelengths on the surface of the material, and combines the spectrum of the material contained in the ground object with the spatial influence reflecting the existence pattern of the ground object, that is, integrates the remote sensing image and the spectrum to realize Spectral integration. Simultaneously record the information of the two, take the pixel as the unit, image in each band separately, add one-dimensional spectral information on the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00G06T7/49
CPCG06T2207/10032G06T2207/10036G06V20/13
Inventor 张立毅刘静光陈雷李锵孙彦慧
Owner TIANJIN UNIV OF COMMERCE
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