地震前后遥感影像空间尺度特性与最优空间尺度选择

地震 ›› 2013, Vol. 33 ›› Issue (2): 19-28.

地震前后遥感影像空间尺度特性与最优空间尺度选择

陈文凯¹, 何少林¹, 裴惠娟², 窦爱霞³, 周中红¹

1.中国地震局兰州地震研究所, 甘肃兰州 730000;
2.中国科学院资源环境科学信息中心, 甘肃兰州 730000;
3.中国地震局地震预测研究所, 北京 100036

收稿日期:2013-01-23 出版日期:2013-04-30 发布日期:2020-09-27
作者简介:陈文凯(1983-), 男, 青海民和人, 获硕士学位, 助理研究员, 主要从事RS和GIS应用技术等研究。
基金资助:
中国地震局地震应急青年重点任务(CEA_EDEM-2012)和中国地震局兰州地震研究所地震科技发展基金(2011Q03)资助

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

CHEN Wen-ka^1,2, HE Shao-lin¹, PEI Hui-juan², DOU Ai-xia³, ZHOU Zhong-hong¹

1. Lanzhou Institute of Seismology, CEA, Lanzhou 730000, China;
2. Scientific Information Center for Resources and Environment, CAS, Lanzhou, 730000, China;
3. Institute of Earthquake Science, CEA, Beijing 100036, China

Received:2013-01-23 Online:2013-04-30 Published:2020-09-27

摘要/Abstract

摘要： 本文基于不同计算窗口大小的改进局部方差方法, 判定地震后遥感影像上的目标物, 如损毁建筑物、完好建筑物的最佳空间尺度。对航片、 QuickBird影像进行了系列实验分析, 得到了在QuickBird影像中城区完好建筑物最佳空间分辨率在2~3 m, 损毁建筑物最佳空间分辨率2~4 m, 航片中城区完好建筑物最佳空间分辨率为3~4 m。最佳空间分辨率与目标地物的尺度紧密相关, 不同尺度大小的地物具有不同的最优空间尺度。最佳空间尺度的选择在处理海量高空间分辨率影像时通过重采样选取最佳空间分辨率, 可以有效减少图像运算时间, 在地震灾害快速评估中具有一定的应用意义。

关键词: 遥感, 空间尺度, 最佳空间尺度, 地震灾害评估

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

中图分类号:

P315.9

陈文凯, 何少林, 裴惠娟, 窦爱霞, 周中红. 地震前后遥感影像空间尺度特性与最优空间尺度选择[J]. 地震, 2013, 33(2): 19-28.

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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