RT Journal Article T1 Scene wireframes sketching for Unmanned Aerial Vehicles A1 Santos Mateos, Roi A1 Pardo López, Xosé Manuel A1 Fernández Vidal, Xosé Ramón K1 3D abstraction K1 Reconstruction K1 Line-based sketching K1 UAV AB This paper introduces novel insights to improve the state-of-the-art line-based unsupervised observation and abstraction models of man-made environments. The increasing use of autonomous UAVs inside buildings and around human-made structures demands new accurate and comprehensive representation of their operation environments. Most of the 3D scene abstraction methods use invariant feature point matching, nevertheless some sparse 3D point clouds do not concisely represent the structure of the environment. The presented approach is based on observation and representation models using the straight line segments. The goal of the work is a complete method based on the matching of lines, that provides a complementary approach to state-of-the-art methods when facing 3D scene representation of poor texture environments for future autonomous UAV. Oppositely to other recently published methods obtaining 3D line abstractions, the proposed method features 3D segment abstraction in the absence of a previously generated point based reconstruction. Another advantage is the ability to group the resulting 3D lines according to different planes, for exploiting coplanar line intersections. These intersections are used like feature points in the reconstruction process. It has been proved that this method exclusively based on lines can obtain spatial information in the adverse situations when a SIFT-like SfM pipeline fails to generate a dense point cloud. PB Elsevier YR 2019 FD 2019 LK https://hdl.handle.net/10347/38368 UL https://hdl.handle.net/10347/38368 LA eng NO Santos, R., Pardo, X. M., & Fdez-Vidal, X. R. (2019). Scene wireframes sketching for Unmanned Aerial Vehicles. Pattern Recognition, 86, 354–367. https://doi.org/10.1016/j.patcog.2018.09.017 NO This is a The author's version of the work Santos, R., Pardo, X. M., & Fdez-Vidal, X. R. (2019). Scene wireframes sketching for Unmanned Aerial Vehicles. Pattern Recognition, 86, 354–367. https://doi.org/10.1016/j.patcog.2018.09.017 NO This work has received financial support from the Xunta de Galicia through grant ED431C 2017/69 and Xunta the Galicia (Centro singular de investigación de Galicia accreditation 2016–2019) and the European Union (European Regional Development Fund - ERDF) through grant ED431G/08. DS Minerva RD 27 abr 2026