應用數值地型於立體空載SAR影像之分析; Application of DTM to the Analysis of Stereo Airborne SAR Images

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题名:	應用數值地型於立體空載SAR影像之分析;Application of DTM to the Analysis of Stereo Airborne SAR Images
作者:	鄭凱仁;Kai-Rin Chien
贡献者:	土木工程研究所
关键词:	混合平差;最小二乘匹配;地元匹配;前方交會
日期:	2000-07-14
上传时间:	2009-09-18 17:07:15 (UTC+8)
出版者:	國立中央大學圖書館
摘要:	本研究是以兩個雷達測量條件式為基礎，先完成方位參數求解及最佳化，後輔以地形因子進行地元匹配與空間定位。首先引述單張SAR影像雷達測量條件式，採多項式來描述SAR載具之飛行軌跡，利用混合平差求解方位參數。並進行統計檢定，對所求得之方位參數做一最佳化處理，方使所求得之方位參數為後續研究所使用。其次，由於SAR影像成像時幾何特性之影響，使得一般影像匹配之技術在執行上有些許之困難，故而考慮地形因子之使用。以地元之角度出發，結合最小二乘匹配技術，完成所謂之地元匹配。最後於空間定位之部分，是以上述之方位參數及匹配成果，進行前方交會。實驗區影像是於1993年10月，由農委會委託國立中央大學太空及遙測中心約請加拿大INTERA公司所獲取之台灣空載SAR影像。實驗區位於屏東縣潮州鎮附近，涵蓋範圍東西約16 km，南北約12 km。 The research is based on the two Radargrammetric Conditions, firstly finding out the best result by orientation parameter, then assisted by DTM for groundel matching and space location. Firstly it refers to single SAR image Radargrammetric Conditions, applying polynomials for description of SAR's flying track, then using mixed adjustment method in order to find out orientation parameters. It also uses statistics testing to reach the best orientation parameters, which can be continuously researched and used in the future. However, SAR image can cause geometric distortions. As a result, there will be difficulty in performing the technique of matching general images. Consequently, it has been considered to use DTM which starts from the viewpoints of the ground, mixed with LS matching methods, reaches finally the so-called "Groundel Matching". The space intersection finally is done based on the above mentioned exterior orientation parameters and matching outcome. Experimental area image is a SAR image obtained from INTERA CO, CANADA through the invitation of Center for Space and Remote Sensing Research of the National Central University and assisted by Agriculture Commission in October 1993. The experimental area is near Chaochou town, Ping Tung county. It covers 16 km from east to west, and 12 km from north to south.
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