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Remote sensing earthquake damage information extracting and digging method based on pixels

A technology of information extraction and remote sensing, applied in seismic signal processing, image analysis, image data processing, etc., can solve problems such as heavy workload, high cost, and difficulty in meeting timeliness requirements, and achieve the effect of ensuring accuracy and improving efficiency

Inactive Publication Date: 2010-07-28
中国土地勘测规划院
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Problems solved by technology

[0004] Although manual visual interpretation of earthquake damage information has great advantages in the accuracy and reliability of information acquisition, it is difficult to meet the requirements due to heavy workload, low efficiency, high cost, and long time for information interpretation, collection, and compilation. Application requirements for timeliness

Method used

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specific Embodiment approach

[0012] The pixel-based remote sensing earthquake damage information extraction and mining method of the present invention, its preferred specific implementation, includes the steps:

[0013] First of all, for pre-disaster and post-disaster images of different time phases, the change area is automatically found through the method of spectral variation and principal component fusion;

[0014] Then, use the double-threshold region growing algorithm to segment the image, segment out the change area and obtain the change information binary image;

[0015] Finally, artificial visual interpretation is performed on the segmented change area and change information, and the earthquake damage information is extracted.

[0016] The automatic discovery of the change region through the method of spectral variation and principal component fusion may include:

[0017] The pre-disaster IKONOS image and the post-disaster QUICKBIRD image are respectively subjected to principal component transfo...

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Abstract

The invention discloses a remote sensing earthquake damage information extracting and digging method based on pixels. The method comprises the following steps of: firstly, automatically finding a change area by a spectrum variance and main component integration method according to the remote sensing images of different time phases before and after earthquake; then, segmenting the change image by using a dual-threshold area growth algorithm to obtain change information binary images; finally, carrying out artificial visual interpretation on the segmented binary images of the change area, and extracting the earthquake damage information. The invention solves the problems that the workload of artificial interpretation on the earthquake change information is large and the survey period is long, enhances the efficiency, and simultaneously guarantees the sufficient precision.

Description

technical field [0001] The invention relates to a method for acquiring earthquake damage information, in particular to a pixel-based remote sensing earthquake damage information extraction and mining method. Background technique [0002] The rapid extraction of earthquake damage information and the rapid assessment of earthquake damage loss are important basic information for disaster relief decision-making. [0003] In the prior art, the extraction and evaluation of earthquake damage information is mainly through the method of manual visual interpretation. [0004] Although manual visual interpretation of earthquake damage information has great advantages in the accuracy and reliability of information acquisition, it is difficult to meet the requirements due to heavy workload, low efficiency, high cost, and long time for information interpretation, collection, and compilation. Application requirements for timeliness. Contents of the invention [0005] The purpose of the...

Claims

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Application Information

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IPC IPC(8): G01V1/28G06T7/00
Inventor 王静吴剑何挺刘爱霞
Owner 中国土地勘测规划院
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