A new interpretation and improvement of the nonlinear anisotropic diffusion for image enhancement

Author

Monteil, JérÔme ; Beghdadi, Azeddine

Author_Institution

L2Ti-Inst. Galilee, Univ. de Paris-Nord, Villetaneuse, France

Volume

21

Issue

9

fYear

1999

fDate

9/1/1999 12:00:00 AM

Firstpage

940

Lastpage

946

Abstract

The purpose of the article is to give an analysis of the anisotropic diffusion (AD) and propose adaptive nonlinear filtering based on a judicious choice of the conductance function (CF) and the edgeness threshold. A new undesirable effect, which we call the “pinhole effect” may result when AD is introduced for the first time. A robust solution to this effect is proposed and evaluated through experimental data. The evolution of the diffused signal is analyzed through a physical model using the optical flow technique (OFT). The overall strategy is evaluated through experimental results obtained on synthetic and actual images

Keywords

adaptive filters; filtering theory; image enhancement; image sequences; nonlinear filters; adaptive nonlinear filtering; conductance function; edgeness threshold; nonlinear anisotropic diffusion; optical flow technique; pinhole effect; Anisotropic magnetoresistance; Equations; Filtering; Geometrical optics; Image enhancement; Low pass filters; Nonlinear filters; Nonlinear optics; Optical filters; Optical noise;

fLanguage

English

Journal_Title

Pattern Analysis and Machine Intelligence, IEEE Transactions on

Publisher

ieee

ISSN

0162-8828

Type

jour

DOI

10.1109/34.790435

Filename

790435