Visual fixation invariant

Daniel Raviv; Nissim Ozery

doi:10.1117/12.189075

13 October 1994 Visual fixation invariant

Daniel Raviv, Nissim Ozery

Proceedings Volume 2354, Intelligent Robots and Computer Vision XIII: 3D Vision, Product Inspection, and Active Vision; (1994) https://doi.org/10.1117/12.189075
Event: Photonics for Industrial Applications, 1994, Boston, MA, United States

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.

Citation Download Citation

Daniel Raviv and Nissim Ozery "Visual fixation invariant", Proc. SPIE 2354, Intelligent Robots and Computer Vision XIII: 3D Vision, Product Inspection, and Active Vision, (13 October 1994); https://doi.org/10.1117/12.189075

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