针对航空交错延时积分(Time delay and integration,TDI)红外影像奇数行和偶数行之间灰度差异、错动以及影像降晰问题,提出了一种交错TDI红外影像复原方法.首先采用对影像灰度差异不敏感的基于相位相关(Phase-only correlation,POC)的...针对航空交错延时积分(Time delay and integration,TDI)红外影像奇数行和偶数行之间灰度差异、错动以及影像降晰问题,提出了一种交错TDI红外影像复原方法.首先采用对影像灰度差异不敏感的基于相位相关(Phase-only correlation,POC)的位移估计方法估计奇数行影像和偶数行影像之间的亚像素精度位移场.其次以奇数行影像为参考,根据位移估计结果对偶数行影像做点对点灰度校正,并对齐奇数行影像和灰度校正后的偶数行影像.最后采用BTV(Bilateral total variation)正则化超分辨率重建方法反降晰,得到复原影像.实验结果表明复原影像中奇偶行的错动得到有效补偿,地物的边缘和纹理结构更加清晰,影像质量显著提高.展开更多
In early morning of Aug 8th, 2010, the rain-triggered tremendous debris flows broke out simultaneously at the Sanyanyu ravine and Luojiayu ravine, which locate in the north part of Zhouqu County town. The debris flow ...In early morning of Aug 8th, 2010, the rain-triggered tremendous debris flows broke out simultaneously at the Sanyanyu ravine and Luojiayu ravine, which locate in the north part of Zhouqu County town. The debris flow is the most severe event of the same kind of disasters in the past sixty years in China, which caused great losses of people's lives and properties. Based on field investigation, remote sensing image interpretation and analysis of local climatological data, the local topographical conditions, active tectonic movement, massive debris source and torrential rains were the main formation causes which induced the catastrophic debris flows. Moreover, detailed geological surveys were carried out following the disaster, the other geological potential hazard sites were found out, and the geological and seismic hazard assessment has been put into practice. At last, scientific and appropriate countermeasures have been suggested to prevent and mitigate the extraordinarily serious debris flow.展开更多
文摘针对航空交错延时积分(Time delay and integration,TDI)红外影像奇数行和偶数行之间灰度差异、错动以及影像降晰问题,提出了一种交错TDI红外影像复原方法.首先采用对影像灰度差异不敏感的基于相位相关(Phase-only correlation,POC)的位移估计方法估计奇数行影像和偶数行影像之间的亚像素精度位移场.其次以奇数行影像为参考,根据位移估计结果对偶数行影像做点对点灰度校正,并对齐奇数行影像和灰度校正后的偶数行影像.最后采用BTV(Bilateral total variation)正则化超分辨率重建方法反降晰,得到复原影像.实验结果表明复原影像中奇偶行的错动得到有效补偿,地物的边缘和纹理结构更加清晰,影像质量显著提高.
基金Foundation item： Projects（40902094, 50978239） supported by the National Natural Science Foundation of China Project（20121ESLZ01） supported by the Institute of Earthquake Prediction, China Earthquake Administration
文摘In early morning of Aug 8th, 2010, the rain-triggered tremendous debris flows broke out simultaneously at the Sanyanyu ravine and Luojiayu ravine, which locate in the north part of Zhouqu County town. The debris flow is the most severe event of the same kind of disasters in the past sixty years in China, which caused great losses of people's lives and properties. Based on field investigation, remote sensing image interpretation and analysis of local climatological data, the local topographical conditions, active tectonic movement, massive debris source and torrential rains were the main formation causes which induced the catastrophic debris flows. Moreover, detailed geological surveys were carried out following the disaster, the other geological potential hazard sites were found out, and the geological and seismic hazard assessment has been put into practice. At last, scientific and appropriate countermeasures have been suggested to prevent and mitigate the extraordinarily serious debris flow.
