Title :
Real-time online camera synchronization for volume carving on GPU
Author :
Haufmann, Torkel Andreas ; Brodtkorb, Andre Rigland ; Berge, Asbjorn ; Kim, A-Rong
Author_Institution :
Dept. Appl. Math., SINTEF, Oslo, Norway
Abstract :
Volume carving is a well-known technique for reconstructing a 3D scene from a set of 2D images, using features detected in individual cameras, and camera parameters. Spatial calibration of the cameras is well understood, but the resulting carved volume is very sensitive to temporal offsets between the cameras. Automatic synchronization between the cameras is therefore desirable. In this paper, we present a highly efficient implementation of volume carving and synchronization on a heterogeneous system fitted with commodity GPUs using an improved version of the algorithm in [1]. An online, real-time synchronization system is described and evaluated on surveillance video of an indoor scene. Improvements to the state of the art CPU-based algorithms are described.
Keywords :
calibration; cameras; computer graphics; graphics processing units; image reconstruction; real-time systems; synchronisation; video surveillance; 2D images; 3D scene reconstruction; CPU-based algorithms; GPU; automatic synchronization; camera parameters; heterogeneous system; indoor scene; online synchronization system; real-time online camera synchronization; real-time synchronization system; spatial calibration; surveillance video; volume carving; Cameras; Graphics processing units; IP networks; Streaming media; Surveillance; Synchronization; Three-dimensional displays;
Conference_Titel :
Advanced Video and Signal Based Surveillance (AVSS), 2013 10th IEEE International Conference on
Conference_Location :
Krakow
DOI :
10.1109/AVSS.2013.6636654
