Title

Interpretation Of Motion Trajectories Using Focus Of Expansion

Keywords

Dynamirc scene analysis focus of expansion motion; trajectories

Abstract

The focus of expansion (FOE) of a group of motion trajec. tories 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. © 1992 IEEE

Publication Date

1-1-1992

Publication Title

IEEE Transactions on Pattern Analysis and Machine Intelligence

Volume

14

Issue

12

Number of Pages

1205-1210

Document Type

Article

Identifier

scopus

Personal Identifier

scopus

DOI Link

https://doi.org/10.1109/34.177386

Socpus ID

0026982278 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/0026982278

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