Abstract: Today’s digital world requires us to access and protect computer information and interact securely with computer systems. Traditional methods for personal authentication such as physical key, ID card, secret password, PIN, …., etc. These methods suffer from various problems. Biometric measurements which mean biological features such as fingerprints, voice, face, hand geometry,…,etc. have a convenient and reliable solution to these problems. Recently, iris authentication has received increasing attention due to its high reliability for high security applications. The phasor demodulator is simply a four quadrant plane that maps the resulting feature matrix, from applying the normalized image to Gabor filter, to binary code. This mapping depends on the sign of both the real and imaginary part of the feature matrix. In this paper we show how to get Iris code with different Sizes using phase demodulator.

• Publication Date: 17-Nov-2014
• DOI: 10.15224/978-1-63248-010-1-09
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Abstract: The paper proposes a mixed method for reducing the order of discrete time interval systems. The numerator and denominator of the reduced order model is obtained by forming table and combining factor division method and Cauer second form. Bilinear transformation (z = p+1) is used during the process of higher order discrete interval systems before applying reduction method. The proposed method shows that it is well suited to reduce both denominator and numerator interval discrete polynomials. The proposed method is compared with the existing methods of discrete interval system reduction. A numerical example has been discussed to illustrate the procedure. Accuracy of the system stability has been verified by using step response.

• Publication Date: 02-Jun-2014
• DOI: 10.15224/978-1-63248-010-1-10
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