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Many different automatic color correction approaches have been proposed by different research communities in the past decade. However, these approaches are seldom compared, so their relative performance and applicability are unclear. For multi-view image and video stitching applications , an ideal color correction approach should be effective at(More)
— Autonomous robot navigation in outdoor environments remains a challenging and unsolved problem. A key issue is our ability to identify safe or navigable paths far enough ahead of the robot to allow smooth trajectories at acceptable speeds. Colour or texture-based labeling of safe path regions in image sequences is one way to achieve this far field(More)
Autonomous robot navigation in unstructured outdoor environments is a challenging area of active research and is currently unsolved. The navigation task requires identifying safe, traversable paths that allow the robot to progress toward a goal while avoiding obstacles. Stereo is an effective tool in the near field, but used alone leads to a common failure(More)
— We address the problem of building topological maps in visual space for robot navigation. The nodes of our topological maps consist of clusters along manifolds, and we propose an unsupervised learning algorithm that automatically constructs these manifolds-the user need only specify the desired number of clusters and the minimum number of images per(More)
— Autonomous robot navigation in unstructured outdoor environments is a challenging area of active research. The navigation task requires identifying safe, traversable paths which allow the robot to progress toward a goal while avoiding obstacles. Machine learning techniques—in particular, classifier ensembles—are well adapted to this task, accomplishing(More)
In telepresence applications each user is immersed in a rendered 3D-world composed from representations transmitted from remote sites. The challenge is to compute dense range data at high frame rates, since participants cannot easily communicate if the processing cycle or network la-tencies are long. Moreover, errors in new stereoscopic views of the remote(More)
In an immersive tele-presence environment a 3D remote real scene is projected from the viewpoint of the local user. This 3D world is acquired through stereo reconstruction at the remote site. In this paper, we start a performance analysis of stereo algorithms with respect to the task of immer-sive visualization. As opposed to usual monocular image based(More)
Tele-immersion is a new medium that enables a user to share a virtual space with remote participants, by creating the illusion that users at geographically dispersed locations reside at the same physical space. A person is immersed in a remote world, whose 3D representation is acquired remotely, then transmitted and displayed in the viewer's environment.(More)