Reconstruction voxelique temps réel Jean-Marc Hasenfratz E107.

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Presentation transcript:

Reconstruction voxelique temps réel Jean-Marc Hasenfratz E107

Reconstruction voxellique temps réel CYBER-II

Reconstruction voxellique temps réel Description générale

Reconstruction voxellique temps réel Not limited to 4 cameras! Platforme 2m

Reconstruction voxellique temps réel Background Subtraction Actor moving… Silhouettes Textures Background learning (5 sec.)

Reconstruction voxellique temps réel Compute the Visual Hull Definition Two approaches: –Volume based –Surface based Surface based Silhouettes Volume based

Reconstruction voxellique temps réel Voxel Carving Principle in 2D Camera 1Camera 2 Camera 3 Voxel grid 8x8

Reconstruction voxellique temps réel Fast Voxel Carving using GPU 64 pixels 2m 64 3 Voxels 3cm 3

Reconstruction voxellique temps réel Fast Voxel Carving using GPU 64 pixels

Reconstruction voxellique temps réel Fast Voxel Carving using GPU 64*8=512 pixels 64*8*2=1024 pixels

Reconstruction voxellique temps réel (64*8*2) 2 = (64*8) 2 =512 2 AND Fast Voxel Carving using GPU

Reconstruction voxellique temps réel Vidéos

Reconstruction voxellique temps réel Objectifs Version précédente sur SGI Onyx –Limitation nombreuses (prix, GPU, CPU…) Faire exploser le système ! –Résolution / temps / mémoire –Utilisation de carte graphique bus PCI Mémoire de texture importante

Reconstruction voxellique temps réel Question ? ARTIS Jean-Marc HASENFRATZ E107

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