文章基本信息

标题：Precise Georeferencing in the Absence of Ground Control: A Strip Adjustment Approach
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作者：C.S. Fraser ; M. Ravanbakhsh ; M. Awrangjeb 等
期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2016
卷号：XL-3/W4
出版社：Copernicus Publications
摘要：The options available for orientation of satellite imagery in cases requiring optimal metric precision are generally rational functions, where the RPCs are provided by the image supplier, or a rigorous physical model. In either case, it is ground control that facilitates pixel-level georeferencing via a compensation for systematic errors in the sensor metadata. In many remote parts of the world, where satellites are the most viable source of imagery for mapping, there is a lack of ground control, which thus precludes bias-free georeferencing. This paper reports on a practical means of overcoming this problem, namely the orientation of long strips of imagery through a bundle adjustment process that requires ground control at the endpoints only. The adjustment utilises a rigorous sensor orientation model. RPCs are then generated for each scene within the strip of images from the adjusted sensor orientation data. These facilitate bias-free georeferencing without reference to ground control. The approach discussed has previously proven successful for automated orthoimage generation from ALOS imagery, and in this paper its application to a 7-scene strip of QuickBird imagery is reported
关键词：Sensor modelling; satellite imagery; strip adjustment; RPCs; accuracy evaluation