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：2004
卷号：XXXV Part B3
页码：1067-1072
出版社：Copernicus Publications
摘要：With the increasing number of cameras the need for plug-and-play calibration procedures arises to realize a subsequent automatic geometric evaluation of observed scenes. An easy calibration procedure is proposed for a non-zooming station- ary camera observing objects of initially equal and known heights above a ground plane. The image coordinates of the corresponding foot and head points of these objects serve as observations. For the interior and exterior orientation of the camera a minimal parametrization is introduced with the height of the camera above the ground plane, its pitch and roll angle and the principal distance. With the idea of corresponding foot and head trajectories being homologue, the situation can be reformulated with a virtual second camera observing the scene. Therefore a plane induced homography can be established for the observation model. This special planar homology can be parametrisied with the unknown calibration quantities. Initially the calibration is estimated by observing foot and head points of objects with known heights. In the subsequent evaluation phase the height and positions of unknown objects can be determined. With the same procedure the calibration can be checked and updated if needed. The approach is evaluated with a real scene
