Feature extraction with the fractional Fourier transform
Author(s)
Advisor
Özaktaş, Haldun M.Date
1998Publisher
Bilkent University
Language
English
Type
ThesisItem Usage Stats
155
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Abstract
In this work, alternative design and implementation techniques for feature
extraction applications are proposed. The proposed techniques amount to decomposing
the overall feature extraction problem into a global linear system
followed by a local nonlinear system. Different output representations for representation
of input features are also allowed and used in these techniques.
These different output representations bring cui additional degree of freedom
to the feature extraction problems. The systems provide multi-outputs consisting
of different features of the input signal or image. Efficient implementation
of the linear part of the .system is obtained by using fractional Fourier filtering
circuits. Expressions for the proposed techniques are derived and several
illustrative examples cxre given in which efficient implementations for feature
extraction applications are obtained.
Keywords
Image analysisFeature extraction
Fractional Fourier transform
Fractional Fourier domains
Fractional Fourier filtering circuits