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Spacetime Stereo: A Unifying Framework for Depth from Triangulation
IEEE Transactions on Pattern Analysis and Machine Intelligence (PAMI), February 2005

James Davis, Diego Nehab, Ravi Ramamoorthi,
Szymon Rusinkiewicz


Depth estimates of three frames in a dynamic scene (one of the authors smiling), captured at 40 Hz. Note recovery of subtle features like the cheek deformation.

Abstract

Depth from triangulation has traditionally been investigated in a number of independent threads of research, with methods such as stereo, laser scanning, and coded structured light considered separately. In this paper, we propose a common framework called spacetime stereo that unifies and generalizes many of these previous methods. To show the practical utility of the framework, we develop two new algorithms for depth estimation: depth from unstructured illumination change, and depth estimation in dynamic scenes. Based on our analysis, we show that methods derived from the spacetime stereo framework can be used to recover depth in situations in which existing methods perform poorly.

Citation (BibTeX)

James Davis, Diego Nehab, Ravi Ramamoorthi, and Szymon Rusinkiewicz. Spacetime Stereo: A Unifying Framework for Depth from Triangulation. IEEE Transactions on Pattern Analysis and Machine Intelligence (PAMI) 27(2):296-302, February 2005.

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Links
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  Extended version as a technical report