Chair for Computer Aided Medical Procedures & Augmented Reality
Lehrstuhl für Informatikanwendungen in der Medizin & Augmented Reality

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A. Bigdelou, A. Ladikos, N. Navab
Incremental Visual Hull Reconstruction
British Machine Vision Conference (BMVC), London (UK), September 7-10, 2009 (bib)

We propose a novel algorithm for incrementally reconstructing the visual hull in dynamic scenes by exploiting temporal consistency. Using the difference in the silhouette images between two frames we can efficiently locate the scene parts that have to be updated using ray casting. By only concentrating on the parts of the scene that have to be checked for changes, we achieve a significant speed up over traditional methods, which reconstruct each frame independently. Our method does not use any kind of scene model and works regardless of the number and shape of the objects in the scene. We test our algorithm on sequences taken with a multi-camera system and perform a detailed performance analysis showing that our method outperforms other existing methods.
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