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提高“天绘一号”卫星条带影像拼接精度的技术探讨
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作者 程家胜 穆春迪 +1 位作者 李扬 姜艳媛 《航天返回与遥感》 CSCD 2018年第2期84-92,共9页
"天绘一号"卫星2m全色相机焦平面共8片TDI-CCD器件,分上下两行品字形交错排列组成。目前地面处理系统采用基于SIFT特征点匹配的分段线性拼接算法,将8片条带影像进行拼接。然而受地形起伏、云层移动、影像对比度等多种因素影响... "天绘一号"卫星2m全色相机焦平面共8片TDI-CCD器件,分上下两行品字形交错排列组成。目前地面处理系统采用基于SIFT特征点匹配的分段线性拼接算法,将8片条带影像进行拼接。然而受地形起伏、云层移动、影像对比度等多种因素影响,易出现局部拼接错位现象,条带拼接精度不高,降低了卫星的使用性能。为解决上述问题,文章重点分析了影响拼接精度的因素,并提出了基于分段线性拼接和拼接区域逻辑自适应影像增强技术的影像拼接方法。经过大量试验验证,该方法有效地解决了长条带影像拼接参数不一致、拼接区域影像对比度不高等问题,提高了器件片间拼接精度,在"天绘一号"卫星条带影像的拼接中取得了良好的应用效果。 展开更多
关键词 尺度不变的特征转换算法 分段线性拼接 影像增强 “天绘一号”卫星 空间遥感应用
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Improving wavelet reconstruction algorithm to achieve comprehensive application of thermal infrared remote sensing data from TM and MODIS 被引量:1
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作者 周启刚 Chen Dan 《High Technology Letters》 EI CAS 2015年第2期224-230,共7页
According to the data characteristics of Landsat thematic mapper (TM) and MODIS, a new fu sion algorithm about thermal infrared data has been proposed in the article based on improving wave let reconstruction. Under... According to the data characteristics of Landsat thematic mapper (TM) and MODIS, a new fu sion algorithm about thermal infrared data has been proposed in the article based on improving wave let reconstruction. Under the domain of neighborhood wavelet reconstruction, data of TM and MO DIS are divided into three layers using wavelet decomposition. The texture information of TM data is retained by fusing highfrequency information. The neighborhood correction coefficient method (NC CM) is set up based on the search neighborhood of a certain size to fuse lowfrequency information. Thermal infrared value of MODIS data is reduced to the space value of TM data by applying NCCM. The data with high spectrum, high spatial and high temporal resolution, are obtained through the al gorithm in the paper. Verification results show that the texture information of TM data and high spec tral information of MODIS data could be preserved well by the fusion algorithm. This article could provide technical support for high precision and fast extraction of the surface environment parame ters. 展开更多
关键词 neighborhood wavelet reconstruction neighborhood correction coefficient method( NCCM) thematic mapper (TM) MODIS thermal infrared remote sensing image
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