Visual hull

Visual hull

The Visual hull is a geometric entity created by shape-from-silhouette 3D reconstruction technique introduced by Laurentini.This technique assumes the foreground object in an image can be separated fromthe background. Under this assumption, the original image can be thresholdedinto a foreground/background binary image, which we call a silhouette image.The foreground mask, known as a silhouette, is the 2D projection of the corresponding3D foreground object. Along with the camera viewing parameters, thesilhouette defines a back-projected generalized cone that contains the actual object.This cone is called a "silhouette cone". The upper right thumbnail shows two such cones produced from two silhouette images taken from different viewpoints. The intersection of the two conesis called a visual hullcite web
url=http://portal.acm.org/citation.cfm?coll=GUIDE&dl=GUIDE&id=628563
title=The visual hull concept for silhouette-based image understanding
month=February | year=1994
work = IEEE Trans. Pattern Analysis and Machine Intelligence.
pages = 150-162
author=A. Laurentini
] , which is a bounding geometry of the actual 3Dobject (see the bottom right thumbnail).

References

External links

* [http://limingchina.googlepages.com/Visual_Hull.html A collection of academic papers, researchers]


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