Quantification de dégâts sur le bâti liés aux catastrophes majeures par images satellite multimodales très haute résolution

Abstract : In a disaster aftermath, it is required to know rapidly the severity of the damage on buildings. Presently, this damage assessment is manually conducted through a visual comparison of satellite images. Automatic methods are immature; their performances being seldom quantified, they are not used by operational. We propose a standard protocol to quantify the performances of the damage assessment methods. It is based on reference databases obtained from five various disaster cases. The protocol allows to quantify the performances of a method and to compare its results to other ones. Having this assessment protocol, we propose a damage assessment method from a pair of panchromatic very high spatial resolution satellite images and a set of objects of interest defined in the reference image. The developed method has to lead to satisfying and reproducible results using images acquired with different modalities, and to be automated as much as possible. The damage on buildings are quantified from the amplitude of the changes on their roof. To compare the latter, they have to be registered. The geometric registration of very high resolution (VHR) images is an unsolved difficult problem; a new method that is adapted to our problem is developed and assessed. It generally leads to satisfying results for our application. Then change features are extracted. Two correlation coefficients and some textural features obtained by filtering are extracted, and a damage degree is attributed to each building through a supervised classification method. The impact of the differences in image modality on the performances of our method is assessed. The proposed method is fast, can be applied mostly generally, and is robust along with the use of VHR images with different spatial resolution or acquired with different sensors; the influential parameter is the B/H of the images pair.
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domain_other. École Nationale Supérieure des Mines de Paris, 2008. French. <NNT : 2008ENMP1548>


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Submitted on : Monday, November 17, 2008 - 8:00:00 AM
Last modification on : Wednesday, November 10, 2010 - 5:25:01 PM

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  • HAL Id : pastel-00004211, version 1

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Anne-Lise Chesnel. Quantification de dégâts sur le bâti liés aux catastrophes majeures par images satellite multimodales très haute résolution. domain_other. École Nationale Supérieure des Mines de Paris, 2008. French. <NNT : 2008ENMP1548>. <pastel-00004211>

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