Visual hull construction in the presence of partial occlusion

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Visual hull construction in the presence of partial occlusion (2006)

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by Li Guan , Sudipta Sinha , Jean-sébastien Franco , Marc Pollefeys

Venue:	in Proc. 3DPVT’6
Citations:	10 - 2 self

BibTeX

@INPROCEEDINGS{Guan06visualhull,
    author = {Li Guan and Sudipta Sinha and Jean-sébastien Franco and Marc Pollefeys},
    title = {Visual hull construction in the presence of partial occlusion},
    booktitle = {in Proc. 3DPVT’6},
    year = {2006},
    pages = {3--06}
}

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Abstract

In this paper, we propose a visual hull algorithm, which guarantees a correct construction even in the presence of partial occlusion, while “correct ” here means that the real shape is located inside the visual hull. The algorithm is based on a new idea of the “extended silhouette”, which requires the silhouette from background subtraction and the “occlusion mask ” of the same view. In order to prepare the occlusion mask, we also propose a novel concept of “effective boundary ” of moving foreground objects in a video obtained from a static camera. The accumulation of the effective boundary through time automatically gives robust occluder boundaries. We theoretically prove that our algorithm deterministically computes the tightest, correct visual hull in the presence of occlusion. Both synthetic and real examples are given as a demonstration of the correctness of the algorithm. Finally we analyze that this new algorithm is still within the time complexity of the traditional method. 1.

Keyphrases

partial occlusion visual hull construction visual hull occlusion mask effective boundary extended silhouette real example foreground object new idea new algorithm background subtraction traditional method static camera novel concept correct construction time complexity visual hull algorithm real shape robust occluder boundary

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