远景摄影测量的一种标定方法及其应用  

A Calibration Method for Far-Field Photogrammetry and Its Application

作　　者：余永生[1] 毕卫涛[1] 

机构地区：[1]北京大学湍流与复杂系统研究国家重点实验室,北京100871

出　　处：《北京大学学报（自然科学版）》2006年第5期628-631,共4页Acta Scientiarum Naturalium Universitatis Pekinensis

摘　　要：远景摄影测量物体位移时,需要标定物像之间的比例关系。标定可以通过在目标位置处放置一个已知方位角的标尺来完成,但是在实践中,标尺的放置和方位角的测量常常是有困难的。作者提出了一种利用正多边形物体进行摄影标定的方法,证明了具有同一正投影像的正多边形是全等的。据此,可以由正多边形物体的正投影像提取原像的尺寸,实现物像关系的标定。该方法成功地应用于某标志性建筑物风致振动的现场测量。In displacement measurements by far-field photography, the scale between object and image has to be calibrated. The calibration can be carried out by placing a rule at the position of the object. In practice, however, this is usually not possible. Especially the orientation of the rule is difficult to set precisely. In this research, a calibration method is proposed by use of equilateral polygon, which can be the hat of a bolt. The authors prove the equilateral polygons that have the same front projection are congruent. Therefore, the size of the equilateral polygon can be uniquely extracted by its front-projection image and the photogrammetric calibration can be done accordingly. This calibration method is successfully implemented in a field measurement of the wind-induced vibration of a structure.

关 键 词：摄影测量 物像关系 标定 

分 类 号：P232[天文地球—摄影测量与遥感]