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：2008
卷号：XXXVII Part B1
页码：695-702
出版社：Copernicus Publications
摘要：There are now many different digital sensor systems available for photogrammetr y, remote sensing and digital image analysis. Cramer (2005) provides a summary of the systems available in 2005 and these include; single and multi-cone/lens systems as well as high resolution push broom scanners. Before any imagery can be used for high precision measurement purposes in photogrammetry there is a need to determine the geometric model of the sensing system. In the case of frame cameras there is a need to establish the sensor model and deter mine the relationship of this model in comparison to the standard normally (and tr aditionally) used in photogrammetry which is perspective geometry. The process of measuring the relationship of a 'real' frame camera geometry in comparison to perspective geometry is known as camera calibration. Camera calibration is normally undertaken by the manufacturer before supplying a camera for photogrammetry then periodically, and when necessary, during the life of the camera. The technology of GPS and an inertial measurement unit (IMU) integrated with an aerial camera, either analogue or digital, is r egularly being used for pr oduction purposes. The importance of GPS and IMU measurements is increasing as there is greater and greater interest to work without ground control and strive towards direct georeferencing of imagery. Arguably, direct georeferencing can be considered with and without aerial triangulation as the use of automatically measured minor control points (tie and pass points) can be easily and efficiently undertaken by modern aerial triangulation software. Critical to the success of direct georef erencing, particularly without aerial triangulation, are the IMU measurements and therefore the determination of the geometric r elationship between the IMU and the camera geometry. As experience is gained from undertaking misalignment ( boresight) calibrations a number of inter esting results are being produced
关键词：UltraCam D; Interior calibration; Exterior calibration; Misalignment; Direct georef erencing
