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 1
出版社：Copernicus Publications
摘要：The availability of high accuracy position and orientation information obtained from the integration of GPS and inertial systems allows the direct determination of the image orientation parameters without the need for ground control points. Although several advantages are offered by the direct sensor orientation, precaution should be taken when dealing with multi-sensor sy stems. In GPS/INS-assisted photogrammetric systems, besides the camera calibration, the geometric relationship between the sensors (mounting parameters) must be known as well. More specifically, the lever-arm offset between the sensors, as well as the misalignment (boresight angles) between the IMU body frame and the photogrammetric camera should be determined. The offsets are usually measured using traditional surveying techniques, while approximate values for the boresight angles are known from the mechanical alignment. Since these initial mounting parameters might be biased, they should be refined through an in-flight calibration. The objective of this paper is to investigate the aspects involved in the design and implementation of an in-flight mounting parameters calibration, as they relate to control and flight configuration requirements. The paper starts with a brief discussion of the concept and prerequisites of GPS/INS-assisted photogrammetric triangulation procedure. Then, a mathematical analysis of the GPS/INS-assisted camera point-positioning equation, leading to the determination of the flight configuration and the control requirements for mounting parameters estimation, is performed. The presented analysis is evaluated through experimental results using simulated and real datasets
关键词：direct sensor orientation; mounting parameters; system calibration
