Title

Interpretation Of Motion Trajectories Using Focus Of Expansion

Title - Alternative

IEEE Trans. Pattern Anal. Mach. Intell.

Keywords

Dynamic Scene Analysis; Focus Of Expansion; Motion; Trajectories; Optical-Flow; Computer Science, Artificial Intelligence; Engineering, Electrical &; Electronic

Abstract

The focus of expansion (FOE) of a group of motion trajectories is defined to be a point in the image plane at which the trajectories intersect when they are extended. The FOE observed over a time sequence defines the locus of FOE. We present an analytical approach for the study of dynamic events as they project on the image plane by analyzing the locus of FOE. We have found that the locus of FOE can be used to make qualitative assertions regarding the type of motion. An interesting behavior of the locus of FOE for various types of motion is observed. The cases include a single point, a horizontal, a vertical, and a slopped straight line. We can also determine whether the object has approaching and receding motion or when the object changes its direction of motion. This inference may be used in qualitative computer vision.

Publication Title

Ieee Transactions on Pattern Analysis and Machine Intelligence

Volume

14

Issue/Number

12

Publication Date

1-1-1992

Document Type

Letter

Language

English

First Page

1205

Last Page

1210

WOS Identifier

WOS:A1992KC57300007

ISSN

0162-8828

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