地震前后遥感影像空间尺度特性与最优空间尺度选择

Abstract

Abstract: Using the modified local variance method based on different sizes of calculation window, we determine objects after earthquake such as damaged building, intact buildings. By conducting a series of experimental analysis on the aerial and Quickbird image, we obtain that on the Quickbird image the optimal spatial resolution of intact urban buildings is about 2~3 m and the damage buildings is 2~4 m, on the aerial image the optimal spatial resolution of intact urban buildings is about 3~4 m. The optimal spatial resolution is closely related to the size of the object on the ground. And objects of different sizes have different optimal spatial scale. While processing a large amount of images with high spatial resolution, we choose the optimal spatial scale through resampling. This method can effectively reduce the calculational time on the image and is theoretically meaningful for the application of remote sensing technology to fast assessment of earthquake disaster.

Key words: Remote Sensing, Space Scale, Optimal Spatial Resolution, Earthquake Disaster Assessment

CLC Number:

P315.9

CHEN Wen-ka, HE Shao-lin, PEI Hui-juan, DOU Ai-xia, ZHOU Zhong-hong. Analysis and Optimal Selection of Spatial Scale for Remote Sensing Images before and after Earthquakes[J]. EARTHQUAKE, 2013, 33(2): 19-28.

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Analysis and Optimal Selection of Spatial Scale for Remote Sensing Images before and after Earthquakes

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