filename : was07.pdf entry : article conference : pages : 203-216 year : 2007 month : February title : Point-sampled 3D video of real-world scenes subtitle : author : Michael Waschbüsch, Stephan Würmlin, Daniel Cotting, Markus Gross booktitle : Signal Processing: Image Communication ISSN/ISBN : 0923-5965 editor : publisher : Elsevier publ.place : volume : 22 issue : 2 language : english keywords : 3D video, free-viewpoint video, scene acquisition, point-based graphics abstract : This paper presents a point-sampled approach for capturing three-dimensional video footage and subsequent re-rendering of real-world scenes. The acquisition system is composed of multiple sparsely placed 3D video bricks. The bricks contain a low-cost projector, two gray-scale cameras and a high-resolution color camera. To improve on depth calculation we rely on structured light patterns. Texture images and pattern-augmented views of the scene are acquired simultaneously by time multiplexed projections of complementary patterns and synchronized camera exposures. High-resolution depth maps are extracted using depth-from-stereo algorithms performed on the acquired pattern images. The surface samples corresponding to the depth values are merged into a view-independent, point-based 3D data structure. This representation allows for efficient post-processing algorithms and leads to a high resulting rendering quality using enhanced probabilistic EWA volume splatting. In this paper, we focus on the 3D video acquisition system and necessary image and video processing techniques.