Preliminary Application of Hyperspectral Remote Sensing Technology in Earthquake Damage Assessment
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摘要: 高光谱遥感作为20世纪空间对地观测技术重大进步的产物，通过其较高的光谱分辨率，为人们提供了丰富的地球表面信息，在各个研究领域得到了快速发展和广泛应用，并取得了卓越的成果。尽管高光谱遥感具有独特的优势，但是针对其在震害评估领域中应用的相关研究较少。本文在总结高光谱遥感的特征、优势及不同领域应用现状的基础上，开展了其在震害评估领域的应用研究。基于ASD地物波谱仪获取的建（构）筑物光谱曲线构建可用于震害分析所需的光谱特征库，对比光谱库中地物曲线之间的差异后，发现高光谱遥感在震害评估领域中的应用是可行的，因不同震害地物之间的光谱特征曲线存在差异，依据这种差异可区分不同的震害信息，从而对震害遥感图像进行精细分类。Abstract: As the development and major progress of the space to earth observation technology in the twentieth century, hyper spectral remote sensing has been extensively applied in various fields of research with its high spectral resolution, which provides rich information of earth surface. Although hyper spectral remote sensing is of unique superiority, no much effort has been put on seismic damage. assessment so far. Based on the summary of the characteristic advantages and application situation, earthguake damage assessment is carried out by using hyper spectral remote sensing. A typical damaged feature spectral library is constructed through collecting the spectral characteristic curves of different structures. The difference between the different spectral curves was identified, and the relationship between spectral curve and seismic damage information was explored. Our results suggest that it is feasible to apply hyper spectral remote sensing in earthquake disaster assessment. Different damage features have different spectral characteristic curves. And then, earthguake damage information can be well classified based on the spectral differences.
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图 1 不同建筑物材料光谱特征曲线
Figure 1. Spectral characteristic curves of different building materials
图 2 高光谱遥感影像震害信息识别技术流程图
Figure 2. Flowchart of seismic disaster information identification technique for hyperspectral remote sensing image
图 3 实验采集地点及光谱特征曲线
Figure 3. Experimental data collection sites and corresponding spectral characteristic curves
图 4 实验采集地点及光谱特征曲线
Figure 4. Experimental data collection sites and corresponding spectral characteristic curves
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