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NMF image fusion-based SAR image change detection method

A technology of image change detection and image fusion, which is applied in the field of image processing, can solve the problems of unclear physical meaning and low accuracy rate, and achieve the effect of clear physical meaning and improved accuracy rate

Inactive Publication Date: 2016-11-09
XIDIAN UNIV
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Problems solved by technology

[0007] The purpose of the present invention is to overcome the defects in the above-mentioned prior art, and provide a SAR image change detection method based on NMF image fusion, which is used to solve the low accuracy rate existing in the existing SAR image change detection method based on image fusion Technical issues with unclear physical meaning

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[0040]The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0041] refer to figure 1 , the implementation steps of the present invention are as follows:

[0042] Step 1. Obtain two SAR images of the same size in the same area at different times, and perform denoising processing on them. Common denoising processing methods include PPB speckle denoising algorithm, mean filtering algorithm and non-local mean algorithm. This embodiment adopts the mean value filtering algorithm, and the mean value filtering is a typical linear filtering algorithm, and the main method it adopts is the neighborhood averaging method. Considering the principle of SAR image imaging: each pixel is affected by the scattering of neighboring pixels, which can be regarded as a certain degree of superposition of its neighboring pixels at this point, so the current pixel to be processed is calculated by using its neighborhood mean valu...

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Abstract

The invention proposes an NMF image fusion-based SAR (Synthetic Aperture Radar) image change detection method, which is used for solving the technical problems of low accuracy and indefinite physical significance in an existing image fusion-based SAR image change detection method. The method is implemented by the following steps of inputting two original SAR images same in region and different in time, and constructing two basic difference graphs Xl and Xm after de-noising processing; performing neighborhood feature description on Xl and Xm to obtain feature description matrixes XL and XM; constructing a change detection feature matrix X by utilizing the two feature description matrixes; performing NMF non negative matrix decomposition on X to obtain a decomposed coefficient matrix H; obtaining a post-fusion difference graph by utilizing the coefficient matrix; and clustering the post-fusion difference graph into two classes by utilizing a clustering algorithm to obtain a change detection result. According to the method, detail information of the original images is better utilized; and the image fusion method has a more remarkable physical significance and can be used for analysis and labeling of SAR image change information.

Description

technical field [0001] The invention belongs to the technical field of image processing, and relates to a SAR image change detection method, in particular to a SAR image change detection method based on NMF image fusion, which can be used for analysis and labeling of SAR image change information. Background technique [0002] With the development of a series of optical and radar satellite operation services, a large amount of remote sensing data has been accumulated. Through further analysis, processing and interpretation of these image data, the image data obtained by remote sensing technology can be transformed into useful information. Information, and then serve in various fields of the national economy. [0003] All pictures that record the size of electromagnetic waves of various ground objects are called remote sensing images, among which synthetic aperture radar SAR (Synthetic Aperture Radar) images are an important branch of remote sensing images. It is an advanced a...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/50G06T5/00
CPCG06T5/50G06T5/70
Inventor 张建龙李巧高新波周晓鹏
Owner XIDIAN UNIV
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