Hybrid Biometric System Using Iris and Speaker Recognition

Year 2016, Special Issue (2016), 216 - 219, 01.12.2016

Gökçen Çetinel , Llukman Çerkezi Barış Yazar Doğukan Eroğlu

https://doi.org/10.18100/ijamec.270332

Cited By: 1

Abstract

In this study, a hybrid
security system is proposed. The proposed system is composed of two subsystems
namely iris recognition system (IRS) and speaker recognition system (SRS).
Pre-processing, feature extraction and feature matching are the main steps of
these systems. In IRS subsystem, Gaussian filter, Canny edge detector, Hough
transform, and histogram equalization is performed for pre-processing,
respectively. After that, by
applying 4-level Discrete Wavelet Transform (DWT) to pure iris image, the iris
image is decomposed into four sub-bands (LL4, LH4, HL4 and HH4). In order to
extract the feature vector from iris pattern, the LH4, HL4 and HH4 sub-bands
(matrices) are merged into one matrix. Finally the matrix is transformed in
vector to obtain the feature vector of iris image. For SRS subsystem, the
pre-processing step includes spectral arrangement, silence part removing and
band limitation operations. After pre-processing, frame blocking and windowing
are applied to the long-term speech samples and then Fast Fourier Transform
(FFT) is performed for the each short-term speech segments (frames). Finally,
the Mel Frequency Cepstral Coefficients (MFCC) technique is performed in order
to obtain feature vector of the speech. The feature matching step of both IRS
and SRS is implemented with Dynamic Time Warping (DTW) which is an efficient
algorithm to measure the distance between two vectors. According to the DTW
results, the false acceptance rate (FAR) is zero and false rejecting rate (FRR)
is about 4 % for the proposed hybrid system. 

Keywords

Biometric systems, iris recognition, speaker recognition, DTW

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