Building seismic damage information extraction method and device
A technology of information extraction and building, which is applied in the direction of instruments, character and pattern recognition, computer parts, etc., and can solve the problems of poor accuracy of earthquake damage information extraction
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Embodiment 1
[0050] figure 1 A flow chart showing a method for extracting building earthquake damage information provided by an embodiment of the present invention can be applied to earthquake damage assessment in earthquake-stricken areas and can improve the accuracy of building earthquake damage information extraction. The method includes the following steps:
[0051] S101: Acquiring image information in the full-polarization SAR data of the earthquake-damaged area, where the image information includes polarization information and texture information.
[0052] Wherein, the above-mentioned full-polarization synthetic aperture radar data is a single-temporal PolSAR image after an earthquake, which can be acquired by an airborne SAR sensor or a spaceborne SAR sensor, which is not specifically limited in this embodiment of the present invention.
[0053] Considering the method of multi-temporal PolSAR image recognition of earthquake damage information of buildings, it will not only be diffic...
Embodiment 2
[0085] Figure 4 It shows a flow chart of the second method for extracting building earthquake damage information provided by the embodiment of the present invention. Based on the first embodiment, the method includes:
[0086] S401: Acquiring image information in the full-polarization SAR data of the earthquake-damaged area, where the image information includes polarization information and texture information.
[0087] Considering that image information in full-polarization SAR data usually has the defect of speckle noise, based on this, the method for extracting building earthquake damage information provided in this embodiment further includes a preprocessing step S101.
[0088] S402: Preprocessing the image information.
[0089] This step mainly uses the polarimetric SAR image filtering algorithm (such as the refined Lee filtering algorithm) to perform speckle denoising on the above image information, so as to reduce the impact of speckle noise on subsequent results, impr...
Embodiment 3
[0111] Such as Figure 5 As shown, the embodiment of the present invention provides a building earthquake damage information extraction device, including an image acquisition module 10 , a compensation module 20 , a polarization decomposition module 30 , a texture feature extraction module 40 , and a classification extraction module 50 .
[0112] The image acquisition module 10 is used to acquire image information in the full polarization SAR data of the earthquake damaged area, the image information includes polarization information and texture information.
[0113] The compensation module 20 is configured to perform polarization azimuth offset estimation and compensation on the above polarization information to obtain polarization azimuth compensation data.
[0114] The polarization decomposition module 30 is used to perform Yamaguchi polarization decomposition on the above-mentioned polarization azimuth angle compensation data to obtain dihedral scattering dominant features...
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