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Stereo Image Processing for a Daily-Revisit Satellite

机译：每日重访卫星的立体声图像处理

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With the daily-revisit capability, FORMOSAT-2 has taken the first images and continuously monitoring after large disasters over the world to support the aftermath relief and precaution of secondary disasters, especially for the southern Asia tsunami on 2004.12.26, the Wilkins Ice Shelf disintegration on 2008.2.28, the Sichuan earthquake on 2008.5.12, the typhoon Morakot over Taiwan on 2009.8.8, and the Japan earthquake on 2011.3.11. FORMOSAT-2 imaged areas in nine years are about 8 times of the worldwide land areas. But due to poor resolution near the borders of the 14 strips of the coverage, rare population in some regions, and continuously imaging for the large disasters, the image map shows it has taken images over half areas of the worldwide lands. FORMOSAT-2 frequently repeats to image the same area, but there are still different in the view angles of several degrees. This is a challenge to process the stereo images for those images with small differences of the viewing angles, because they are mostly in same direction, rather than in forward/backward or rightward/leftward directions as the traditional way. In this paper, we develop an algorithm for the registration of the stereo pair and the derivation of the surface elevation with arbitrary viewing angles. There are no significant differences in the RMS errors, which mean the algorithm is stable for arbitrary difference of view angles. Applications of the processing include the 3D change detection, terrain features monitoring, disaster area reconstruction, and animation display.
机译：借助日常访问功能，FORMOSAT-2拍摄了第一张图像，并在全球发生大灾后进行连续监控，以支持善后工作和继发性灾难的预防，尤其是对于2004.12.26发生在南亚海啸中的威尔金斯冰架2008年2月28日解体，2008.5.12年四川地震，2009.8.8年台湾台风莫拉克和2011.3.11日日本地震。九年来，FORMOSAT-2成像面积约为全球陆地面积的8倍。但是由于覆盖范围14条带边界附近的分辨率差，某些地区的人口稀少以及对大灾难的不断成像，图像地图显示它已在全球土地的一半以上区域拍摄了图像。 FORMOSAT-2经常重复拍摄同一区域的图像，但视角仍存在几度差异。对于那些视角变化很小的图像，处理立体图像是一个挑战，因为它们通常与传统方式在相同方向上，而不是在向前/向后或向右/向左的方向上。在本文中，我们开发了一种用于立体对的配准和以任意视角推导表面高程的算法。 RMS误差没有显着差异，这意味着该算法对于任意视角的差异都是稳定的。该处理的应用包括3D变化检测，地形特征监视，灾区重建和动画显示。

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