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High-spectral image unmixing method based on differential search

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

Inactive Publication Date: 2016-03-30
TIANJIN UNIV OF COMMERCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • High-spectral image unmixing method based on differential search
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  • High-spectral image unmixing method based on differential search

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Embodiment Construction

[0043] The progress of the present invention will be described below in conjunction with the drawings.

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

[0045] I ( Y ) = - l o g | W | - X i = 1 N E [ X k = 1 P ( 2 k - 1 ) x i 2 k - 2 ] + X i = 1 N H ( y i )

[0046] Among them, the value range of I(Y) is [0, ∞). 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 element in the pixel. Based on this, in the linear mixed model, the objective function defining the non-negative abundance constraint is

[0048] f A N C ( Y ) = X i = 1 N X j = 1 P ( y i j - ) 2 n / 2 n

[0049] Among them, n is a positive...

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Abstract

The invention discloses a high-spectral image unmixing method based on the differential search. According to the technical scheme of the invention, bound terms corresponding to the characteristic structure that the abundance of a high-spectral image is nonnegative and the abundance sum of the high-spectral image is 1, are combined with the mutual information to serve as an objective function. Based on the differential search method, the objective function is optimized and solved to realize the unmixing purpose of the high-spectral image. The method plays an important role in the fields of ecological environment monitoring, disaster prediction, resource exploration, crop yield estimation, vegetation classification, military satellite reconnaissance, military target detection, and the like.

Description

Technical field [0001] The present invention relates to the field of hyperspectral remote sensing, and more specifically, to a method for unmixing hyperspectral images 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 appearance 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 pattern of the ground object, that is, the remote sensing image and the spectrum are integrated to achieve Integration of spectrum and image. Record the information of the two at the same time, take the pixel as the unit, image each band separately, add one-dimensional spec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06T7/40
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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