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Nature. 1989 Feb 9;337(6207):549-55.

A parallel algorithm for real-time computation of optical flow.

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Center for Biological Information Processing, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139.


The precise management of two-dimensional field of velocities from time-varying two-dimensional images is impossible in general. It is, however, possible to compute suitable 'optical flows' that are qualitatively similar to the velocity field in most cases. We describe a simple, parallel algorithm that computes an optical flow from sequences of real images, which is consistent with human psychophysics and suggests plausible physiological models. In particular, our algorithm runs on a Connection Machine supercomputer in close-to-real time. It shows several of the same 'illusions' that are perceived by humans. A natural physiological implementation of the model is consistent with data from cortical areas V1 and MT.

[Indexed for MEDLINE]

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