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Proceedings Paper

Visual fixation invariant
Author(s): Daniel Raviv; Nissim Ozery
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Paper Abstract

This paper deals with a visual-motion fixation invariant. We show that during fixation there is a measurable nonlinear function of optical flow that produces the same value for all points of a stationary environment regardless of the 3-D shape of the environment. During fixated camera motion relative to a rigid object, e.g., a stationary environment, the projection of the fixated point remains (by definition) at the same location in the image, and all other points located on the 3-D rigid object can only rotate relative to the 3-D fixation point. This rotation rate of the points is invariant for all points that lie on the particular environment, and it is measurable from a sequence of images. This new invariant is obtained from a set of monocular images, and is expressed explicitly as a closed form solution. In this paper we show how to extract this invariant analytically from a sequence of images using optical flow information, and we present results obtained from real data experiments.

Paper Details

Date Published: 13 October 1994
PDF: 7 pages
Proc. SPIE 2354, Intelligent Robots and Computer Vision XIII: 3D Vision, Product Inspection, and Active Vision, (13 October 1994); doi: 10.1117/12.189075
Show Author Affiliations
Daniel Raviv, Florida Atlantic Univ. and National Institute of Standards and Technology (United States)
Nissim Ozery, Florida Atlantic Univ. (United States)

Published in SPIE Proceedings Vol. 2354:
Intelligent Robots and Computer Vision XIII: 3D Vision, Product Inspection, and Active Vision
David P. Casasent, Editor(s)

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