NDLI: Dynamic depth recovery from unsynchronized video streams

Content Provider	IEEE Xplore Digital Library
Author	Chunxiao Zhou Hai Tao
Copyright Year	2003
Description	Author affiliation: Dept. of Comput. Eng., Univ. of California, Santa Cruz, CA, USA (Chunxiao Zhou; Hai Tao)
Abstract	We propose an algorithm for estimating dense depth information of dynamic scenes from multiple video streams captured using unsynchronized stationary cameras. We solve this problem by first imposing two assumptions about the scene motion and the temporal offset between cameras. The motion of a scene is described using a local constant velocity model and the camera temporal offset is assumed to be constant within a short of period of time. Based on these models, geometric relations between the images of moving scene points, the scene depth, the scene motions, and the camera temporal offset are investigated and an estimation method is developed to compute the camera temporal offset. The three main steps of the proposed algorithm are: 1) the estimation of the temporal offset between cameras, 2) the synthesis of synchronized image pairs based on the estimated camera temporal offset and optical flow fields computed in each view, and 3) the stereo computation based on the synthesized synchronous image pairs. The proposed algorithm has been tested on both synthetic data and real image sequences. Promising quantitative and qualitative experimental results are demonstrated in the paper.
Sponsorship	IEEE Comput. Soc Tech. Committee on Pattern Anal. & Machine Intelligence (TCPAMI)
File Size	592511
File Format	PDF
ISBN	0769519008
ISSN	10636919
DOI	10.1109/CVPR.2003.1211490
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-06-18
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Streaming media Layout Cameras Stereo vision Optical computing Motion estimation Video sequences Computer vision Solid modeling Optical sensors
Content Type	Text
Resource Type	Article
Subject	Computer Vision and Pattern Recognition Software

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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