Early Processing of Spatiotemporal Visual Information
Research Overview
Spatiotemporal models for early visual processing in mammalian visual
systems are discussed. Particular attention is given to the issue of
inseprarability in ganglion cells, where spatial response properties
(e.g.. band-pass versus low-pass tuning) are dependent on the
temporal frequencies present in the stimulus.
We also address how one might construct velocity-tuned spatiotemporal
filters from cascades of simple linear filters applied to model ganglion
neurons.
This work began as a part of my MSc thesis at the University of
Toronto under the supervision of Allan Jepson and John Tsotsos.
Related Publications
- Fleet, D.J. and Jepson, A.D. (1989) Hierarchical construction of
orientation and velocity selective filters. IEEE Transactions on
Pattern Analysis and Machine Intelligence, 11(3): 315--325
- Fleet, D.J., and Jepson, A.D. (1985) Spatiotemporal inseparability
in early vision: centre-surround models and velocity selectivity.
Computational Intelligence, 1(3): 89--102
- Fleet, D.J., Hallett, P.E., and Jepson, A.D. (1985) Spatiotemporal
inseparability in early visual processing. Biological Cybernetics,
52(2): 153--164
Return to David Fleet's home page.