基于数字建筑物模型的线阵推扫影像真正射纠正

Digital Building Model Based True Ortho Rectification of Line Array Pushbroom Images

分析了利用数字表面模型直接代替数字高程模型进行正射纠正难以达到真正射效果的原因,阐述了遥感影像真正射纠正的基本流程,针对其中的建筑物遮挡区自动检测这一关键问题,以Z-Buffer算法为基础提出一种解决方案,并利用ADS40影像验证了算法的正确性。

The reason why the goals of true ortho rectification can not he achieved by the replacement of dig- ital elevation model （DEM） with digital surface model （DSM） directly is discussed at first,then the prima- ry workflow of true ortho rectification is discussed. Aiming at automatically detecting the occlusion area of buildings,its key technical matter,a solution based on z-buffer algorithm is proposed. Experimental test using ADS40 three line images shows that related algorithms put forward in this paper is correct.