HPR - Simple and fast "Hidden" Point Removal operator
Abstract Results Software
Abstract
This paper proposes a simple and fast operator, the "Hidden" Point Removal operator, which determines the visible points in a point cloud, as viewed from a given viewpoint. Visibility is determined without reconstructing a surface or estimating normals. It is shown that extracting the points that reside on the convex hull of a transformed point cloud, amounts to determining the visible points. This operator is general ? it can be applied to point clouds at various dimensions, on both sparse and dense point clouds, and on viewpoints internal as well as external to the cloud. It is demonstrated that the operator is useful in visualizing point clouds, in view-dependent reconstruction and in shadow casting.
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Software
The technology referred to in this project, paper and code (below) is protected by a US patent.

This code is based on the following paper (with some small modifications): Sagi Katz, Ayellet Tal, and Ronen Basri, "Direct Visibility of Point Sets", SIGGRAPH 2007. Please cite this work if you use our software

The code in this website is for demo purposes only. Individuals or academic institutes are free to use the saliency maps generated using this version as long as they acknowledge its use. Commercial licensing is managed by the Technion Industry Liaison Office. Please contact Hovav Gazit for details.

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