论文部分内容阅读
1 前言数字摄影测量的最新发展,开辟了构造测图过程的新途径。本文的目的就是扩展基于影象测图的概念结构。在基于影象的测图中,要素的提取和数字化直接在影象上而不是在立体模型上进行。处理中所有的后续阶段,即定向、高程确定,变换和编辑可以按顺序安排,这些阶段既可部分实现联机和实时作业,也可实现脱机和延时操作处理。基于影象数字测图的过程包括确定数字化要素的高程。这些高程可通过内插已知DTM或在立体模型里由选择采样来确定。两种方法都可自动完成。
1 Introduction Recent developments in digital photogrammetry have opened up new avenues for constructing mapping processes. The purpose of this paper is to extend the conceptual structure based on image mapping. In image-based mapping, the extraction and digitization of features are performed directly on the image rather than on the stereoscopic model. All subsequent stages of processing, ie orientation, elevation determination, transformation and editing, can be scheduled in sequence, both for partial online and real-time jobs, as well as off-line and delayed operations. The process of imaging based on digital images includes determining the elevation of the digitized features. These elevations can be determined by interpolating known DTMs or by selecting samples in a stereo model. Both methods can be done automatically.