Oded Sudarsky

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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)
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)
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)
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)
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