Method for detecting change of SAR images based on neighborhood similarity and double-window filtering

An image change detection and similarity technology, applied in image enhancement, image analysis, image data processing, etc., can solve the problem of insufficient detection error rate
CN102081799BInactive Publication Date: 2012-12-12XIDIAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
XIDIAN UNIV
Publication Date
2012-12-12
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for detecting the change of synthetic aperture radar (SAR) images based on neighborhood similarity and double-window filtering, and belongs to the field of change detection of the SAR images. The method comprises the following steps of: firstly, performing geometric correction and registration on two SAR images at different time in the same area; secondly, constructing a difference image graph by neighborhood similarity, and processing the difference image graph by double-window filtering; and finally, performing threshold processing on the filtered differenceimage graph by a maximum between-class variance (Ostu) threshold method to acquire a change detection result graph. By the change detection method based on the neighborhood similarity and the double-window filtering, the problem that the structure of the difference graph is severely influenced by speckle noise of the SAR images during the detection of the change of the SAR images is solved, so that change detection accuracy is improved.
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Description

technical field

[0001] The invention relates to the field of SAR image change detection, and relates to a method for constructing SAR image difference maps of different time phases. The method can be used to solve the problem of low detection accuracy in the field of SAR image change detection, and is suitable for improving the accuracy of SAR image change detection for various complex SAR images. Background technique

[0002] SAR image change detection is a technique to qualitatively or quantitatively analyze and determine the characteristics and processes of surface changes from multi-temporal remote sensing images of the same geographical area acquired at different times. Because compared with the optical remote sensing system, the SAR system has the ability to acquire data around the clock, so the SAR image change detection technology is widely used in various fields, such as environmental monitoring, agricultural research, urban area research, forest monitoring, etc. ....

Claims

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