How to Localize Humanoids with a Single Camera? - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Autonomous Robots Année : 2013

How to Localize Humanoids with a Single Camera?

Résumé

In this paper, we propose a real-time vision-based localization approach for humanoid robots using a single camera as the only sensor. In order to obtain an accurate localization of the robot, we first build an accurate 3D map of the environment. In the map computation process, we use stereo visual SLAM techniques based on non-linear least squares optimization methods (bundle adjustment). Once we have computed a 3D reconstruction of the environment, which com- prises of a set of camera poses (keyframes) and a list of 3D points, we learn the visibility of the 3D points by exploiting all the geometric relationships between the camera poses and 3D map points involved in the reconstruction. Finally, we use the prior 3D map and the learned visibility prediction for monocular vision-based localization. Our algorithm is very efficient, easy to implement and more robust and accurate than existing approaches. By means of visibility prediction we predict for a query pose only the highly visible 3D points thus, speeding up tremendously the data association between 3D map points and perceived 2D features in the image. In this way, we can solve very efficiently the Perspective-n-Point (PnP) problem providing ro- bust and fast vision-based localization. We demonstrate the robustness and accuracy of our approach by show- ing several vision-based localization experiments with the HRP-2 humanoid robot.
Fichier principal
Vignette du fichier
alcantarilla_auro_2013.pdf (1.39 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-00923564 , version 1 (03-01-2014)

Identifiants

Citer

Alcantarilla F. Pablo, Olivier Stasse, Sébastien Druon, Bergasa Luis M., Frank Dellaert. How to Localize Humanoids with a Single Camera?. Autonomous Robots, 2013, 34 (1-2), pp.47-71. ⟨10.1007/s10514-012-9312-1⟩. ⟨hal-00923564⟩
437 Consultations
418 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More