Feature Extraction Algorithm for Automatic Ear Recognition
First Claim
1. A method of recognizing an ear by locating an invariant point in a representation (X) of ear geometry, the method comprising the steps of:
- creating a polar representation (e[θ
, ρ
]) of the ear geometry;
transforming the polar representation by means of a Fourier transformation, wherein a transformed (E[Θ
, P]) polar representation is created; and
sampling the transformed polar representation using a number of samples (n) to create a feature vector (XF) comprising a number (m) of feature components.
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Abstract
The present invention relates to a method and a system of recognizing an ear by locating an invariant point in a representation X of ear geometry. An idea of the present invention is the improve the well known Iannarelli algorithm in that the scheme of the present invention captures and processes all pixels values along an axis and may use an arbitrary number of axes to combine these pixel values to a complete feature vector with a sufficient level of discrimination. The prior art Iannarelli method is improved by performing a Fourier transformation of a polar representation e[θ, p] of the ear, whereby a transformed E[Θ/P] polar representation is created. This transformed representation is sampled to create an ear feature vector XF.
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Citations
17 Claims
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1. A method of recognizing an ear by locating an invariant point in a representation (X) of ear geometry, the method comprising the steps of:
-
creating a polar representation (e[θ
, ρ
]) of the ear geometry;
transforming the polar representation by means of a Fourier transformation, wherein a transformed (E[Θ
, P]) polar representation is created; and
sampling the transformed polar representation using a number of samples (n) to create a feature vector (XF) comprising a number (m) of feature components. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 17)
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9. A system for recognizing an ear by locating an invariant point in a representation (X) of ear geometry, the system comprising means (301) for creating a polar representation (e[θ
- , ρ
]) of the ear geometry, transforming the polar representation by means of a Fourier transformation, wherein a transformed (E[Θ
, P]) polar representation is created, and sampling the transformed polar representation using a number of samples (n) to create a feature vector (XF) comprising a number (m) of feature components. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
- , ρ
Specification