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  • 软件名称:基于PALSAR-1影像的汉函谷关遗迹变化检测研究
  • 软件大小: 0.00 B
  • 软件评级: ★★★
  • 开 发 商: 姜爱辉,刘国林,陈富龙
  • 软件来源: 《遥感技术与应用》
  • 解压密码:www.gissky.net

资源简介

摘要: 合成孔径雷达(SAR)具有全天候、全天时的特点,因此是很好的变化检测信息源。基于SAR的变化检测技术研究有着非常广阔的应用前景。以汉函谷关遗址为实验区,选取2007~2011年7景PALSAR-1影像为数据源,分别研究和比较了基于SAR强度信息和相干信息的变化检测技术,并对研究区拆迁前后地表变化进行了研究。结果表明:利用PALSAR-1相干信息和强度信息的变化检测在汉函谷关遗址动态监测中均具有良好适用性,检测概率分别为0.868和0.697,虚警概率分别为0.385和0.197。中分辨率PALSAR-1相干信息比强度信息对地表变化更为敏感且具有高的信噪比;而基于强度信息的变化检测方法因受斑噪与分辨率的限制,监测应用仍存在局限性。 关键词: 变化检测;  PALSAR-1;  强度信息;  相干信息     Abstract: Due to its data acquisition capacity in all\|weather and all\|time conditions,Synthetic Aperture Radar(SAR) technology has been a valuable tool in change detection,implying the potential in various applications.In this paper,we jointly applied SAR coherent information and intensity information for the change detection (primarily caused by the demolition behavior in 2010~2011)in the study site of Han Hangu Pass (a World Heritage site)using seven PALSAR\|1 remote sensing images acquired in the period from 2007 to 2011.Results show that the two change detection methods,either based on coherent information or intensity information,yielded reliable results,with the detection probability of 0.868 and 0.697,respectively,in conjunction with the false\|alarm probability of 0.385 and 0.197.The comparison related to two methodsindicated that the coherence of PALSAR\|1 was more sensitive to the surface change than the other owing to its higher signal\|to\|noise ratio.Limited by the negative impacts of speckle and low\|median resolution,the application of intensity\|based change detection using PALSAR\|1 still remains problematic.

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