Results of the software approach

The software package was called OrientAL, referring to the important step or orienting the archaeological aerial images (German: Archäologische Luftbilder or AL). OrientAL relies on the exterior orientation values provided by the GNSS/IMU or computes them automatically during the SfM step. Besides the relative image orientation, OrientAL also aims to automate the process of absolute orientation by automatically extracting GCPs from existing datasets.

An overview of the software approach and the first results can be found here:

Karel, W., Doneus, M., Verhoeven, G., Briese, C., Ressl, C., Pfeifer, N., 2013. OrientAL – Automatic geo-referencing and ortho-rectification of archaeological aerial photographs. ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences II-5/W1, 175–180. DOI: 10.5194/isprsannals-II-5-W1-175-2013.

Karel, W., Doneus, M., Briese, C., Verhoeven, G., Pfeifer, N., 2014. Investigation on the Automatic Geo-Referencing of Archaeological UAV Photographs by Correlation with Pre-Existing Ortho-Photos, in: Proceedings of the ISPRS Technical Commission V Symposium, Riva del Garda, Italy. 23–25 June 2014. ISPRS Archives XL-5, pp. 307–312 DOI: 10.5194/isprsarchives-XL-5-307-2014.

The papers can be downloaded here, while the first OrientAL poster can be found below (and download here).