11 accepted papers
In this paper, we present a new compact vision sensor consisting of two fisheye event cameras mounted back-to-back, which offers a full 360-degree view of the surrounding environment. We describe the optical design, projection model and practical calibration using the incoming stream of events, of t
In this paper, we study the problem of estimating the orientation of an event omnidirectional camera mounted on a robot and observing 3D parallel lines in a man-made environment (Manhattan world). We present Gyrevento, the first event-based omnidirectional visual gyroscope. Gyrevento does not requir
Motivated by the limited flight time of batterypowered multi-rotor UAVs, in this paper we address the problem of generating energy-optimal trajectories for a planar quadrotor. More specifically, by considering an accurate electrical model for the brushless DC motors and rest-to-rest maneuvers betwee…
In this paper, we propose a novel cluster-based Next-Best-View path planning algorithm to simultaneously explore and inspect large-scale unknown environments with multiple Unmanned Aerial Vehicles (UAVs). In the majority of existing informative path-planning methods, a volumetric criterion is used f…
In this paper, we study the state-constrained consensus problem and introduce a new family of distributed algorithms based on subspace projection methods which are simple to implement and which preserve, under some suitable conditions, the consensus value of the original discrete-time agreement prot…
We present a new quasi-affine reconstruction of a scene and its application to camera self-calibration. We refer to this reconstruction as QUARCH (QUasi-Affine Reconstruction with respect to Camera centers and the Hodographs of horopters). A QUARCH can be obtained by solving a semidefinite programmi…
In this paper, we present a new characterization of mobility for formations of unicycle robots defined by distance-bearing constraints. In fact, by introducing a simple reduction procedure which associates a prescribed formation with a “macro-robot”, we extend the classification by type proposed by…
In this paper, we consider a non-conventional hexarotor whose propellers can be simultaneously tilted about two orthogonal axes: in this way, its underactuation degree can be easily adapted to the task at hand. For a given tilt profile, the minimum-energy trajectory between two prescribed boundary s…
In this paper, we present a new direct omnidirectional visual gyroscope for mobile robotic platforms. The gyroscope estimates the 3D orientation of a camera-robot by comparing the current spherical image with that acquired at a reference pose. By transforming pixel intensities into a Mixture of Phot…
In this paper, we present a new omnidirectional visual compass for a camera-robot, based on the phase correlation method in the two-dimensional Fourier domain. The proposed visual compass is accurate, robust to image noise, and frugal in the use of computational resources. Moreover, unlike the major
A major limitation of existing battery-powered quadrotor UAVs is their reduced flight endurance. To address this issue, by leveraging the electrical model of a brushless DC motor, we explicitly determine minimum-energy paths between a predefined initial and final configuration of a quadrotor by solv