基于普通数码相机的旋转全景摄影测量方法

Rotation Panorama Photogrammetry Method Based on Digital Camera

  • 摘要: 普通数码相机固定在高精度旋转平台上可集成为旋转全景相机,水平旋转多位置拍摄,可获取全景影像。给出了旋转全景相机的成像几何关系模型,实现了旋转全景相机的标定,利用稀疏分布的少量控制点(最少3个),即可解算出平台旋转中心坐标与起始方位角,及每张像片的外方位元素,再利用多站旋转拍摄的影像进行前方交会就可获得物方点坐标。实验结果表明,本文提出的方法在实际摄影测量中可少受视野和控制点数量的限制,通过较少的控制点即可解算出物方点坐标,且测量精度较好。该方法是在困难场景进行近景摄影测量的一种新的有效手段。

     

    Abstract: Rotating panoramic camera is a common digital camera mounted on a rotating platform of high accuracy. A panoramic image is got with the camera horizontally rotating to shoot image in multi-location. The paper presents the imaging geometry model of rotating panoramic camera. We calibrate the rotating panoramic camera parameters. With few control points(more than 3), the coordinates of the rotating center, the rotating initial azimuth, and exterior orientation elements of each image are calculated. The object coordinates are got by space intersection of multi-station rotating images. The experiments show that the method is less restricted by vision and numbers of control point in actual photogrammetry. The precision of object coordinates is good with few control points. The method is a new effective means of close range photogrammetry in difficult scenes.

     

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