Advanced Topics In Biometrics by Haizhou Li, Kar-Ann Toh, Liyuan Li PDF

By Haizhou Li, Kar-Ann Toh, Liyuan Li

ISBN-10: 9814287849

ISBN-13: 9789814287845

Biometrics is the research of equipment for uniquely spotting people in response to a number of intrinsic actual or behavioral features. After many years of analysis actions, biometrics, as a famous medical self-discipline, has complicated significantly either in functional know-how and theoretical discovery to satisfy the expanding want of biometric deployments. during this publication, the editors supply either a concise and obtainable creation to the sector in addition to a close assurance at the particular study issues of their ideas in a large spectrum of biometrics learn starting from voice, face, fingerprint, iris, handwriting, human habit to multimodal biometrics. The contributions additionally current the pioneering efforts and cutting-edge effects, with distinctive concentrate on sensible matters referring to approach improvement. This ebook is a beneficial reference for tested researchers and it additionally provides a great creation for novices to appreciate the demanding situations.

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It takes the explicit polynomial expansion up to certain degree for the input feature vector and applies sequence kernel based on generalized linear discriminants. Polynomial expansion is to include all the monomials of the features in the feature vector. 16) Suppose that the two sequences of input feature vectors are {xi } and {yi }. 18) i ¯ x is the average expansion over all the feature vectors of the input utterance. b ¯y b ¯ can be obtained similarly from the feature vector sequence {yj }.

A UBM of 512 GMM components, SVM background, and NAP projection matrix was trained on SRE04 data. 5in Advanced Topics in Biometrics b1057-ch01 B. Ma and H. Li 24 where si is the score from the ith classifiers and N = 7 is the total number of classifiers. 0 and w0 is given by the threshold, which yields minimum DCF. The core test of SRE08 was designed to have a short2 training condition, which involves either telephone or interview speech, and a short3 test segment condition, which involves telephone, microphone, or interview speech.

Sonorant consonants are accompanied by sustained vibration in the vocal folds. Continuant consonants do not show a complete constriction along the midsagittal plane of the vocal tract. Strident consonants produce turbulence noise that is comparable in amplitude to surrounding vowels. ) are [−sonorant, +continuant]. Of the fricatives, the alveolar and palatal fricatives /z/, /zh/, /s/, and /sh/ are additionally assigned the [+strident] (or [+strid]) feature. ) are [−sonorant, −continuant]. Affricates have the attributes of both stops and fricatives, and are [−sonorant, −/+continuant]; in addition, they are also [+strident].

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Advanced Topics In Biometrics by Haizhou Li, Kar-Ann Toh, Liyuan Li

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