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：2010
卷号：XXXVIII Part 4
出版社：Copernicus Publications
摘要：This paper describes the temporal geometric constrained bundle adjustment method for exterior orientations of individual imagesacquired from an aerial multi-head camera system without platform calibration parameters and navigation solutions. The aerial multiheadcamera system provides a single synthetic image, which has large coverage, from precisely estimated exterior orientationparameters (EOP) of each image. The EOP of each image can be directly calculated from navigation solutions and platform geometriccalibration parameters. However, if these values are not available for some reason, the EOP of each image can be estimated with controlpoints. In this case, the geometric relationship between camera heads should be considered. Each camera of the multi-head camerasystem is tightly affixed to the platform; therefore, the geometry between camera heads can be considered a constant. The temporalgeometric constraint introduced in this paper is that the relative position (X, Y, and Z) and relative orientation angles (ω, φ, and κ)between cameras heads are the same at different frames (different time instants). This condition can be used as additional observations inthe bundle adjustment. Also, small movements or vibration can be considered by selecting proper weights to the constraint. Theexperiment results show that the temporal geometric constrained approach provides better results, in terms of accuracy as well asprecision, than those of the bundle adjustment without constraints. The proposed approach can also be used for calibrating any multiheadcamera system
