Open Science Slovenia
New in RUL
Automatic orthorectification of high-resolution optical satellite images using vector roads
Kosmatin Fras, Mojca
URL - Presentation file, Visit
This paper presents a completely automatic processing chain for orthorectification of optical pushbroom sensors. The procedure is robust and works without manual intervention from raw satellite image to orthoimage. It is modularly divided in four main steps: metadata extraction, automatic ground control point (GCP) extraction, geometric modeling, and orthorectification. The GCP extraction step uses georeferenced vector roads as a reference and produces a file with a list of points and their accuracy estimation. The physical geometric model is based on collinearity equations and works with sensor-corrected (level 1) optical satellite images. It models the sensor position and attitude with second-order piecewise polynomials depending on the acquisition time. The exterior orientation parameters are estimated in a least squares adjustment, employing random sample consensus and robust estimation algorithms for the removal of erroneous points and fine-tuning of the results. The images are finally orthorectified using a digital elevation model and positioned in a national coordinate system. The usability of the method is presented by testing three RapidEye images of regions with different terrain configurations. Several tests were carried out to verify the efficiency of the procedure and to make it more robust. Using the geometric model, subpixel accuracy on independent check points was achieved, and positional accuracy of orthoimages was around one pixel. The proposed procedure is general and can be easily adapted to various sensors.
splošni fizični geometrijski model
general physical geometric model
Not categorized (r6)
1.01 - Original Scientific Article
FGG - Faculty of Civil and Geodetic Engineering
Number of pages:
Vol. 53, iss. 11
ISSN on article:
Voting is allowed only to
Cite this work
Record is a part of a journal
IEEE transactions on geoscience and remote sensing
IEEE trans. geosci. remote sens.
Institute of Electrical and Electronics Engineers
Similar works from RUL:
Similar works from other Slovenian collections:
You have to
to leave a comment.
0 - 0 / 0
There are no comments!