Automatic Georeferencing of Aerial Images Using Stereo High-Resolution Satellite Images

作者：Oh Jaehong^*; Toth Charles K; Grejner Brzezinska Dorota A

来源：Photogrammetric Engineering and Remote Sensing, 2011, 77(11): 1157-1168.

For airborne surveys, the GPS/INS system has become the primary source for aerial image georeferencing. However, alternative automated georeferencing is required to serve as a backup for georeferencing when GPS/INS-based georeferencing is not feasible. High-resolution satellite images (HRSI) have been globally available with better spatial resolution and increasing positional accuracy. Therefore, HRSI has high potential as a ground control source for aerial image georeferencing which usually requires accurate 3D ground control points. Unfortunately, single imagery, which is often used as a reference, contains relief displacement due to objects on the ground introducing positional errors, unless it is not true ortho-rectified which is costly and time consuming. Therefore, in this study, a stereo HRSI-based automated georeferencing approach is proposed. The use of stereo images can avoid the impact of relief displacement and requires no external height information. The proposed method is based on a multi-scale image matching approach utilizing a combination of SIFT (Scale-Invariant Feature Transform) and RANSAC (RANdom SAmple Consensus). In the georeferencing step, the bundle adjustment with outlier removal of Baarda's data snooping was utilized. Experimental results for a strip of aerial images with stereo Ikonos images showed its potential as a backup system for automated georeferencing.

• 出版日期2011-11