| GF-1卫星WFV影像间匀色方法 |
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| 引用本文： | 韩杰,谢勇.GF-1卫星WFV影像间匀色方法[J].测绘学报,2016,45(12):1423-1433. |
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| 作者姓名： | 韩杰 谢勇 |
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| 作者单位： | 1. 许昌学院城乡规划与园林学院, 河南 许昌 461000;2. 南京信息工程大学地理与遥感学院, 江苏 南京 210044 |
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| 基金项目： | 国家自然科学基金(41671345)，高分辨率对地观测系统共性指南(50-Y20A07-0508-15/16)，许昌学院重点科研基金项目(2016086)Foundation support:The National Natural Science Foundation of China(41671345)，General Manual for High Resolution Earth Observation System(50-Y20A07-0508-15/16)，Key Scientific Research Foundation of Xuchang University(2016086) |
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| 摘 要： | 影像匀色方法是决定拼接后影像能否进一步用于遥感定量化应用的重要环节之一。本文针对我国高分辨率对地观测系统的首发星——GF-1卫星宽覆盖WFV传感器4相机拼接成像特点,提出了一种基于交叉辐射定标的影像间匀色方法。该方法首先利用传统的交叉定标方法获取某一台WFV相机在轨绝对辐射定标系数,然后采用统计分析和仿真模拟方法建立了相邻相机影像间DN值、表观辐亮度的相关模型,在完成相机间绝对辐射性能传递的同时,实现了影像间匀色处理。试验结果表明利用本文获取的交叉辐射定标系数能够有效地消除相邻相机影像重叠区域辐射不一致性的问题,实现WFV影像间匀色。该匀色方法可为其他类似卫星传感器影像间匀色提供参考依据。
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| 关 键 词： | 影像间匀色 交叉辐射定标 GF-1卫星 WFV传感器 MODIS |
| 收稿时间： | 2016-05-20 |
| 修稿时间： | 2016-09-20 |
Image Dodging Algorithm for GF-1 Satellite WFV Imagery |
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| HAN Jie,XIE Yong.Image Dodging Algorithm for GF-1 Satellite WFV Imagery[J].Acta Geodaetica et Cartographica Sinica,2016,45(12):1423-1433. |
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| Authors: | HAN Jie XIE Yong |
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| Institution: | 1. School of Urban-rural Planning and Architecture, Xuchang University, Xuchang 461000, China;2. School of Geography and Remote Sensing, Nanjing University of Information Science & Technology, Nanjing 210044, China |
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| Abstract: | Image dodging method is one of the important processes that determines whether the mosaicking image can be used for remote sensing quantitative application.GF-1 satellite is the first satellite in CHEOS (Chinese high-resolution earth observation system).WFV multispectral sensor is one of the instruments onboard GF-1 satellite which consist of four cameras to mosaic imaging.According to the characteristics of WFV sensor,this paper proposes an image dodging algorithm based on cross/inter-radiometric calibration method.First,the traditional cross calibration method is applied to obtain the calibration coefficients of one WFV camera.Then statistical analysis and simulation methods are adopted to build the correlation models of DN and TOA (top of atmosphere)radiances between adjacent cameras. The proposed method can not only accomplish the radiation performance transfer,but also can fulfill the image dodging.The experimental results show the cross/inter-radiometric calibration coefficients in this paper can effectively eliminate the radiation inconsistency problem of the adjacent camera image which realizes the image dodging.So our proposed dodging method can provide an important reference for other si mi l ar sensor i n future. |
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| Keywords: | image dodging cross/Inter-radiometric calibration GF-1 satellite WFV sensor MODIS |
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