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A Change Detection and Processing Method for Remote Sensing Imagery

A technology of change detection and remote sensing image, applied in image data processing, image analysis, image enhancement and other directions, can solve the problems of noise interference and complex background information, and achieve the effect of reliable and robust results

Active Publication Date: 2019-02-22
HOHAI UNIV
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  • Application Information

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Problems solved by technology

[0005] In order to solve the technical problems raised by the above-mentioned background technology, the present invention aims to provide a change detection and processing method of remote sensing images, which adopts a change detection method based on chi-square transformation based on spatial constraints, and overcomes the complex background information of multi-temporal and multi-spectral remote sensing images. Serious problem with noise interference

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  • A Change Detection and Processing Method for Remote Sensing Imagery
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  • A Change Detection and Processing Method for Remote Sensing Imagery

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Embodiment Construction

[0036] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0037] Such as figure 1 As shown, a remote sensing image change detection processing method, the specific steps are as follows:

[0038] Step 1: Input two high-resolution optical remote sensing images of the same area and different time phases, denoted as X 1 And X 2 .

[0039] Step 2: Pair X 1 And X 2 Image registration is divided into two steps: coarse correction and fine correction:

[0040] For rough geometric correction, use the relevant functions in the ENVI4.8 software to realize the specific operation steps:

[0041] (1) Display the reference image and the image to be corrected;

[0042] (2) Collect ground control points GCPs, GCPs should be evenly distributed in the entire image, and the number of GCPs should be at least 9 or more;

[0043] (3) Calculate the mean square error;

[0044] (4) Use polynomial correction method to correct the image t...

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Abstract

The invention discloses a multi-temporal remote sensing image change detection method based on space constraint Chi-square conversion. The method includes the steps of calculating the multiband difference image of a multi-temporal high-resolution image, calculating the CST value of each point on the image based on the multiband difference image, obtaining a threshold according to confidence level, obtaining a preliminary change detection result, conducting majority filtering (embedding spatial information) for the preliminary result, recalculating the mean value and the variance matrix of an unchanged area according to the filtering result, repeating the process until the detection result does not change, and finally obtaining a final change detection result. The method solves the problem that a multi-temporal multispectral remote sensing image is complex in background information and severe in noise interference.

Description

Technical field [0001] The invention belongs to the technical field of remote sensing image processing, and particularly relates to a change detection processing method for remote sensing images. Background technique [0002] With the continuous accumulation of multi-temporal high-resolution remote sensing data and the successive establishment of spatial databases, how to extract and detect change information from these remote sensing data has become an important research topic in remote sensing science and geographic information science. Based on remote sensing images of the same area in different time phases, it can extract information about dynamic changes in cities and the environment, and provide scientific decision-making basis for resources management and planning, environmental protection and other departments. my country’s “Twelfth Five-Year Plan” will expand the implementation of high-resolution earth observation projects that have been implemented during the “Eleventh ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/00G06T7/30
CPCG06T7/0004G06T2207/10032
Inventor 陈哲石爱业孔伟为王鑫
Owner HOHAI UNIV