filename     : p_Lam04a.pdf
entry        : inproceedings
pages        : 
year         : 2004
title        : Unconstrained Free-Viewpoint Video Coding
author       : Edouard Lamboray, Stephan Würmlin, Michael Waschbüsch, Markus Gross, Hanspeter Pfister
booktitle    : Proceedings of the IEEE International Conference on Image Processing (ICIP), Singapore, October 24-27, 2004 
editor       : 
publisher    : IEEE Computer Society
language     : English
month        : October
keywords     : Free-viewpoint video, scalable video coding, MPEG-4, point-based representations
abstract     : In this paper, we present a coding framework addressing image-space compression for free-viewpoint video. Our framework is based on time-varying 3D point samples which represent real-world objects. The 3D point samples are obtained after a geometrical reconstruction from multiple pre-recorded video sequences and thus allow for arbitrary viewpoints during playback. The encoding of the data is performed as an off-line process and is not time-critical. The decoding however, must support for real-time rendering of the dynamic 3D data. We introduce a compression framework which encodes multiple point attributes like depth and color into progressive streams. The reference data structure is aligned on the original camera input images and thus enables for easy view-dependent decoding. A novel differential coding approach permits random access in constant time throughout the entire data set and thus enables arbitrary viewpoint trajectories in both time and space.