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 B5
页码：115-118
出版社：Copernicus Publications
摘要：In photogrammetric applications the use of a digital panoramic camera with 360° field of view may provide an interesting alternative to conventional methods. In this paper, the structure and panorama generation process of our line-CCD-based panoramic system was presented. Specially, we employed a circular fish-eye lens for its large vertical field of view (180°), thus introducing severe distortions to images taken. Different from previous distortion correction methods for wide-angle (usually smaller than 180°) cameras, we used a self-calibrating method with straight-line spherical perspective projection constraint to obtain intrinsic distortion parameters. After retrieving undistorted panorama, the system allows 3D measurement through two spherical images taken from the same location but vertically separated by a so-called baseline. Through fisheye imaging model, it is easy to know the distances of features from the upper camera position and then the distance between two 3D points. There are encouraging results which show the high-precision metric positioning and measuring capability of digital line-CCD-based panoramic system
