Andreas Ruf

Learn More
The recently described junctional adhesion molecules (JAMs) in man and mice are involved in homotypic and heterotypic intercellular interactions. Here, a third member of this family, human JAM-3, was identified and described as a novel counterreceptor on platelets for the leukocyte beta2-integrin Mac-1 (alphaMbeta2, CD11b/CD18). With the help of two(More)
Visual servoing of robot manipulators is a key technique where video images, i.e. the visual appearance of an object is used to control the end-eeector. Most such methods use robots and cameras that have been calibrated. In this report we suggest a non-metric formulation of visual servoing that works with an uncalibrated stereo rig, i.e. in the projective(More)
This paper presents results of a model–based approach to visual tracking and pose estimation for a moving polyhedral tool in position–based visual servoing. This enables the control of a robot in look-and-move mode to achieve six degree of freedom goal configurations. Robust solutions of the correspondence problem – known as " matching " in the static case(More)
BACKGROUND AND PURPOSE This study aimed to characterize the time course of inflammatory parameters after acute ischemic stroke. METHODS We serially determined high sensitivity C-reactive protein (CRP), fibrinogen, and leukocyte counts at 10 time points between days 1 and 90 after ischemic stroke and in control subjects. RESULTS CRP did not significantly(More)
This paper proposes a methodological framework for tra-jectory generation in projective space. The framework enables trajectories that respect rigidity constraints of structure and motion, that are furthermore uniform and optimal in terms of Euclidean configuration, eventhough no camera calibration is assumed. In a projective reconstruction of the scene,(More)
This paper establishes a link between uncalibrated stereo vision and the motion of rigid and articulated bodies. The variation in the projective reconstruction of a dynamic scene over time allows an uncalibrated stereo rig to be used as a faithful motion capturing device. We introduce an original theoretical framework – projective kine-matics – which allows(More)
In this paper we describe a method for estimating the internal parameters of the left and right cameras associated with a stereo image pair. The stereo pair has known epipolar geometry and therefore 3-D projective reconstruction of pairs of matched image points is available. The stereo pair is allowed to move and hence there is a collineation relating the(More)
This paper investigates the homography which transforms a set of points in projective space when undergoing a rigid translation, termed a projective translation. A representation with seven parameters is proposed. They represent explicitly the geometric entities constraining and defining the translation. A practical algebraic method for extracting these(More)