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Abstract: In this paper we show that the optical flow, a 2-D field that can be associated with the variation of the image brightness pattern, and the 2-D motion field, the projection on the image plane of the 3-D velocity field of a moving scene, are in general different, unless very special conditions are satisfied. The optical flow, therefore, is ill-suited for computing structure from motion and for reconstructing the 3-D velocity field, problems that require an accurate estimate of the 2-D motion... (Update)
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BibTeX entry: (Update)
A. Verri and T. Poggio. Motion field and optical flow: Qualitative properties. IEEE Transactions on Pattern Analysis and Machine Intelligence, pages 490--498, May 1989. http://citeseer.ist.psu.edu/article/verri86motion.html More
@article{ verri89motion,
author = "Alessandro Verri and Tomaso Poggio",
title = "Motion Field and Optical Flow: Qualitative Properties",
journal = "IEEE Transactions on Pattern Analysis and Machine Intelligence",
volume = "PAMI-11",
number = "5",
pages = "490--498",
year = "1989",
url = "citeseer.ist.psu.edu/article/verri86motion.html" }
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