Bluetooth enabled devices are potentially vulnerable against passive tracking attacks because of their unique and invariant device address. The contribution of this paper is the exploration of tracking vulnerability of Bluetooth devices. We implemented BlueTrack, a tracking system based on off-the-shelf components. We tested our system at two sites, at a university building with several lecture...

Tracking through long image sequences is a fundamental research issue in computer vision. This task relies on estimating correspondences between image pairs over time where error accumulation in tracking can result in drift. In this paper, we propose an optimization framework that utilises a novel Anchor Patch algorithm which significantly reduces overall tracking errors given long sequences co...

2.3. Solution Assembly simulations and ergonomical studies are major fields for Virtual and Augmented Reality in industry. Both applications require direct object manipulation as the essential interaction method. Finger tracking is a tool, which allows to recognize finger positions without disturbing gloves and cables. Active markers allow to solve both the size and robustness problem: passive ...

Human 3D motion tracking from video is an emerging research field with many applications demanding highly detailed results. This chapter surveys a high quality generative method, which employs the person’s silhouette extracted from one or multiple camera views for fitting an a-priori given 3D body surface model. A coupling between pose estimation and contour extraction allows for reliable track...

We present a novel method of velocity eld estimation for the points on moving contours in a 2-D image sequence. The method determines the corresponding point in a next image frame by minimizing the curvature change of a given contour point. As a rst step, snakes are used to locate smooth curves in 2-D imagery. Thereafter, the extracted curves are tracked continuously computing the corresponding...

The viscosity of a fluid can be measured by tracking the motion of a suspended micron-sized particle trapped by optical tweezers. However, when the particle density is high, additional particles entering the trap compromise the tracking procedure and degrade the accuracy of the measurement. In this work we introduce an additional Laguerre-Gaussian, i.e. annular, beam surrounding the trap, actin...