1. Photogrammetry & Remote Sensing Group, ETH Zurich, Zurich, Switzerland
2. Video Exploitation Syst. (VID) Dept., Fraunhofer Inst. of Optronics, Syst. Technol. & Image Exploitation (IOSB), Karlsruhe, Germany
3. Inst. of Geodesy, Remote Sensing & Image Anal., Tech. Univ. Darmstadt, Darmstadt, Germany