室内控制场数码相机检校应用于通用航空摄影测量的可行性研究

Research on the feasibility of non-metric digital camera calibration in indoor control field applies to general aero photography

非量测数码相机已广泛应用于计算机视觉、摄影测量等领域,但必须对其进行内定向和构像畸变的校正。常用的检校方法主要有室外检校法和室内检校法两类,其中利用室外三维控制场进行数码相机检校是目前较为成熟的做法,而室内三维控制场检校精度能否达到常规比例尺航空摄影要求尚未进行有效验证。通过论述一整套室内三维控制场相机检校方法,并对比分析两种检校结果表明,室内三维控制场检校精度还无法满足通用航摄精度要求。

Non metric digital camera has been widely used in the field of computer vision, photogrammetry and so on. Interior orientation and image distortion correction is necessary when we use non-metric digital camera. The calibration method contains two types of indoor and outdoor. Three-dimensional control field of the outdoor for digital camera calibration is the mature method. The precision of three-dimensional con- trol field of the indoor used in the field of conventional aerial photography has not be verified. It discusses three-dimensional control field of the indoor camera calibration method and make a comparative analysis of two calibration results. The conclusion is the calibration precision of three-dimensional control field of in- door can not meet the general requirements of aero photography.