Stability of phase information

Author

Fleet, David J. ; Jepson, Allan D.

Author_Institution

Dept. of Comput. & Inf. Sci., Queen´´s Univ., Kingston, Ont., Canada

Volume

15

Issue

12

fYear

1993

fDate

12/1/1993 12:00:00 AM

Firstpage

1253

Lastpage

1268

Abstract

This paper concerns the robustness of local phase information for measuring image velocity and binocular disparity. It addresses the dependence of phase behavior on the initial filters as well as the image variations that exist between different views of a 3D scene. We are particularly interested in the stability of phase with respect to geometric deformations, and its linearity as a function of spatial position. These properties are important to the use of phase information, and are shown to depend on the form of the filters as well as their frequency bandwidths. Phase instabilities are also discussed using the model of phase singularities described by Jepson and Fleet. In addition to phase-based methods, these results are directly relevant to differential optical flow methods and zero-crossing tracking

Keywords

filtering and prediction theory; frequency stability; image processing; image recognition; 3D scene; binocular disparity; frequency bandwidths; geometric deformations; image velocity; initial filters; local phase information; optical flow; phase singularities; phase stability; robustness; spatial position; zero-crossing tracking; Frequency; Information filtering; Information filters; Layout; Linearity; Optical filters; Phase measurement; Robustness; Stability; Velocity measurement;

fLanguage

English

Journal_Title

Pattern Analysis and Machine Intelligence, IEEE Transactions on

Publisher

ieee

ISSN

0162-8828

Type

jour

DOI

10.1109/34.250844

Filename

250844