The optical stereo pipeline described in the course is a simplified version of the S2P pipeline [1], which was developed for high resolution pushbroom satellites such as Pleiades or WorldView. One of the particularities of these satellites is that the attitude of the satellite is known with high accuracy (about 50 μrad for Pleiades for instance). This implies that the pointing error in the yaw axis is locally zero, and that roll and pitch can be corrected by a translations in image space [2,3]. For satellites such as SkySat from Planet this pointing error is larger [4], which implies that the yaw error cannot be neglected anymore.
The objective of this project is to extend the S2P 3D reconstruction pipeline to handle spaceborne frame cameras such as Planet Doves and SkySat.
Supervision
Gabriele Facciolo, Carlo de Franchis, Enric Meinhardt
Bibliographic References
[1] C. de Franchis, E. Meinhardt-Llopis, J. Michel, J-M Morel, G. Facciolo. An automatic and modular stereo pipeline for pushbroom images, ISPRS Annals, 2014
[2] H. Schmid. An analytical treatment of the problem of triangulation by stereophotogrammetry. Photogrammetria, 13:67–77, 1 1956.
[3] G. Dial and J. Grodecki. RPC replacement camera models. Proc. ASPRS Annual Conference, Baltimore, pages 1–5, 2005.
[4] PLANET IMAGERY PRODUCT SPECIFICATIONS, https://www.planet.com/products/satellite-imagery/files/Planet_Combined_Imagery_Product_Specs_December2017.pdf
[5] J. Sánchez. The Inverse Compositional Algorithm for Parametric Registration, IPOL, 6, 2016
