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：2004
卷号：XXXV Part B3
页码：1010-1015
出版社：Copernicus Publications
摘要：This paper describes a method appropriate for 3-D measurement from a long distance with a digital camera mounting a super telescopic lens. Long distance observation with telescopic lens camera is a effective method for displacement measurement such as small movement of top of a large cliff. However the conventional orientation method with the central perspective model widely used in close range photogrammetry is unstable in this case because of weak condition. In this study, an alternative model called the orthogonal projection model is applied. This model, which derived from the affine projection model with a constraint of orthogonality, is simple and better adapted to long distance observation. Furthermore, it is a great advantage that the orthogonal projection model does not require initial values of orientation parameters. In this study, the geometric characteristics of the orthogonal projection model were clarified by various simulations, and also the effectiveness of the method was verified by long distance field tests. Focal length of telescopic lens used in the field test was 400mm and distance to objects was over 100m. RMSE between the adjusted results with a camera and those with a totalstation was about 2.8mm. The accuracy with the proposed method is more than twice higher than that with the conventional method
关键词：photogrammetry; vision metrology; orthogonal projection; orientation model; long range observation
