Abstract
We address the problem of egomotion estimation for a monocular observer moving under arbitrary translation and rotation, in an unknown environment. The method we propose is uniquely based on the spatio-temporal image derivatives, or the normal flow. We introduce a search paradigm which is based on geometric properties of the normal flow field, and consists in considering a family of search subspaces to estimate the egomotion parameters. Various algorithms are proposed within this framework. In order to decrease the noise sensitivity of the estimation methods, we use statistical tools, based on robust regression theory. Finally, we present and discuss a wide variety of experiments with synthetic and real images, for various kinds of camera motion.
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