文章基本信息

标题：CALIBRATION AND FIELD EXPERIENCE WITH THE DIGITAL LARGE FORMAT AERIAL CAMERA ULTRACAMD
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作者：M. Gruber ; R. Ladstadter
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：2006
卷号：XXXVI Part 1
出版社：Copernicus Publications
摘要：We present the geometric performance of the digital large format camera UltraCamD. The concept of the geometric calibration by means of a bundle adjustment is shown in detail. Based on the specific design of the camera ad ditional parameters are define d and handled by the bundle adjustment software BINGO. During field application we are able to reduce remaining systematic errors, which may be caused by the change of environmental conditions in the air. The entire calibration procedure consists of four phases. In the first phase a set of images of a well defined geometry target is taken in such way, that highly redundant observations are possible. The second phase is dedicated to image coordi nate measurement. Automation and accuracy is derived by image processing techniques exploiting the specific shape of the well defined targets. The third phase consists of the semi automatic adjustment process, where unknown parameters of the camera (e.g. f ocal length and principal point coordinates, distortio n parameters and additional parameters) are estimated. In phase four we distingu ish between linear and non linear parameters. Linear parameters are used to reduce the linear effect of distortions of the camera. This is achieved by a linear transform of the measured coordinates in such way, that only small nonlinear effects remain. Those effects are then described in a look up table