航空数码相机及其有关问题

介绍了两种航空数码相机的结构;分析了它们与中心投影的关系及相关的问题,如摄影比例尺、像片覆盖范围、测图精度等;并指出了这两种航空数码相机带来的两个问题:像对数增多、高程精度降低;最后提出了解决这两个问题的方法:按图幅为单位进行立体测图、DEM生成,基本实现模型接边自动化;按多目视觉的理论,利用大重叠影像增大交会角,提高高程精度.

Aspects on aerial digital cameras

The structures of two aerial digital cameras are discussed. The relation between thd images acquired by them and inmages acquired by normal aerial film camera is addressed, such as image scale, ground coverage, precision of mapping. Both cameras have the problem of more image pairs and lower height precision as compared with traditional aerial camera. The first problem can be solvedby mapping and DEM generation in mapsheet and automation of model join. The second problem can be solved by multi-view geometry. With high overlap images, the intersection angles will augment, and the height precision will be improved.