Oded Sudarsky

Learn More
We describe an algorithm for occlusion culling by visibility preprocessing. The algorithm intelligently partitions the "ve-dimensional viewing parameter space using a 5D tree (a k-D tree with k"5), such that each leaf of the tree contains a reference to a subset of the n scene objects. The visibility of each of the objects is determined using a ray-casting(More)
The efficient rendering of large dynamic scenes is an important open problem. Optimization techniques for static scenes, such as output-sensitive visibility calculation , must be carefully adapted to dynamic models in order to remain effective. Distributed virtual environments pose a particular difficulty, because communication between the users must be(More)
We present a new active vision technique called zoom tracking. Zoom tracking is the continuous adjustment of a camera's focal length in order to keep a constant-sized image of an object moving along the camera's optical axis. Two methods for performing zoom tracking are presented: a closed-loop visual feedback algorithm based on optical flow, and use of(More)
In this paper we present a new active vision technique called zoom tracking. Zoom tracking is the continuous adjustment of a camera's focal length, to keep a constant-sized image of an object moving along the camera's optical axis. Two methods for performing zoom tracking are presented: a closed-loop visual feedback algorithm based on opticaljlow, and use(More)
Most user interfaces are based on a single method of communication between the user and the systcin (a single "dialogue mode"). Some systems,provide ~veral user interfaces, e.g. a ~enu interface for novice usezs and a command language for experienced.users. We propose a single adaptable user interface (AU!) which allows the user to switch between dialogue(More)
  • 1