| 遥感图象自动识别城市震害房屋-以2001年印度库奇地震和1976年唐山地震为例 |
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| 引用本文： | 柳稼航,单新建,尹京苑.遥感图象自动识别城市震害房屋-以2001年印度库奇地震和1976年唐山地震为例[J].地震学报,2004,26(6):623-633. |
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| 作者姓名： | 柳稼航 单新建 尹京苑 |
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| 作者单位： | 1) 中国北京100029中国地震局地质研究所地震动力学国家重点实验室
2) 中国西安710068中国科学院西安光学精密机械研究所空间光学研究室
3) 中国上海200062上海市地震局 |
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| 基金项目： | 上海市科委资助项目，国家科技攻关项目，022512143，2001BA601B040105，， |
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| 摘 要： | 近断层地震动对地表结构物造成严重的破坏，它具有明显的方向性和脉冲型特征. 在速度时程中含有大幅值、长周期的脉冲波，对结构响应影响很大. 为简化计算和分析的需要，在既有的等效速度脉冲模型的基础上，建议了较为合理等效速度脉冲模型. 在充分收集脉冲型近断层地震记录的基础上，对等效速度脉冲模型的脉冲周期、脉冲强度及卓越脉冲数等参数进行了研究，并与以往研究者的结果进行比较，以利于近断层区结构的抗震设计.
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| 关 键 词： | 区域分析& 震害识别& 图象理解& 库奇地震& 唐山地震 |
| 文章编号： | 0253-3782(2004)06-0623-11 |
| 修稿时间： | 2003年3月19日 |
AUTOMATIC RECOGNITION OF DAMAGED TOWN BUILDINGS CAUSED BY EARTHQUAKE USING REMOTE SENSING INFORMATION:TAKING THE 2001 BHUJ, INDIA, EARTHQUAKE AND THE 1976 TANGSHAN, CHINA, EARTHQUAKE AS EXAMPLES |
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| Abstract: | In the high-resolution images, the undamaged buildings generally show a natural textural feature, while the damaged or semi-damaged buildings always exhibit some low-grayscale blocks because of their coarsely damaged sections. If we use a proper threshold to classify the grayscale of image, some independent holes will appear in the damaged regions. By using such statistical information as the number of holes in every region, or the ratio between the area of holes and that of the region, etc. , the damaged buildings can be separated from the undamaged, thus automatic detection of damaged buildings can be realized. Based on these characteristics, a new method to automatically detect the damage buildings by using regional structure and statistical information of texture is presented in the paper. In order to test its validity, 1-m-resolution iKonos merged image of the 2001 Bhuj earthquake and grayscale aerial photos of the 1976 Tangshan earthquake are selected as two examples to automatically detect the damaged buildings. Satisfied results are obtained. |
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| Keywords: | region analysis damage recognition image comprehension Bhuj earthquake Tangshan earthquake |
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