A new 2D quadrature polar separable filter and its applicable to texture analysis

Author

Kittler, Josef ; Illingworth, John ; Ng, I.

Author_Institution

Dept. of Electron. & Electr. Eng., Surrey Univ., Guildford

fYear

1990

fDate

1-3 May 1990

Firstpage

1050

Abstract

The frequency response of the filter consists of two independent parts. The first is a prolate spheroidal sequence that is dependent on the polar radius. The second is a cosine function of the polar angle. The product of these two parts constitutes a 2-D filtering function. The frequency characteristics of the new filter are similar to that of the 2-D Cartesian separable filter which is defined in terms of two prolate spheroidal sequences. However, in contrast to the 2-D Cartesian separable filter, the position and direction of the new filter in the frequency domain is easy to control. Some applications of the new filter in texture processing, such as generation of synthetic texture, estimation of texture orientation, feature extraction, and texture segmentation, are discussed

Keywords

computerised picture processing; two-dimensional digital filters; 2-D filtering function; 2D quadrature polar separable filter; applications; cosine function; estimation of texture orientation; feature extraction; frequency characteristics; frequency domain; generation of synthetic texture; polar angle; polar radius; prolate spheroidal sequence; texture analysis; texture segmentation; Energy loss; Feature extraction; Filtering; Filters; Frequency domain analysis; Frequency estimation; Frequency response; Image segmentation; Image sequence analysis; Uncertainty;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1990., IEEE International Symposium on

Conference_Location

New Orleans, LA

Type

conf

DOI

10.1109/ISCAS.1990.112289

Filename

112289