Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XXXIX-B6, 111-116, 2012
https://doi.org/10.5194/isprsarchives-XXXIX-B6-111-2012
© Author(s) 2012. This work is distributed under
the Creative Commons Attribution 3.0 License.
 
26 Jul 2012
DETERMINATION OF THE UAV POSITION BY AUTOMATIC PROCESSING OF THERMAL IMAGES
W. Hartmann, S. Tilch, H. Eisenbeiss, and K. Schindler ETH Zurich (Swiss Federal Institute of Technology), Institute of Geodesy and Photogrammetry, Wolfgang-Pauli-Str. 15, 8093 Zurich, Switzerland
Keywords: Thermal, UAV, Camera, Calibration, Bundle, Photogrammetry, GPS/INS Abstract. If images acquired from Unmanned Aerial Vehicles (UAVs) need to be accurately geo-referenced, the method of choice is classical aerotriangulation, since on-board sensors are usually not accurate enough for direct geo-referencing. For several different applications it has recently been proposed to mount thermal cameras on UAVs. Compared to optical images, thermal ones pose a number of challenges, in particular low resolution and weak local contrast. In this work we investigate the automatic orientation of thermal image blocks acquired from a UAV, using artificial ground control points. To that end we adapt the photogrammetric processing pipeline to thermal imagery. The pipeline achieves accuracies of about ±1 cm in planimetry and ±3 cm in height for the object points, respectively ±10 cm or better for the camera positions, compared to ±100 cm or worse for direct geo-referencing using on-board single-frequency GPS.
Conference paper (PDF, 3308 KB)


Citation: Hartmann, W., Tilch, S., Eisenbeiss, H., and Schindler, K.: DETERMINATION OF THE UAV POSITION BY AUTOMATIC PROCESSING OF THERMAL IMAGES, Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XXXIX-B6, 111-116, https://doi.org/10.5194/isprsarchives-XXXIX-B6-111-2012, 2012.

BibTeX EndNote Reference Manager XML