Download Advances in Biometrics: Sensors, Algorithms and Systems by N. K. Ratha, Venu Govindaraju PDF

By N. K. Ratha, Venu Govindaraju


Biometrics know-how maintains to stride ahead with its wider popularity and its genuine desire in quite a few new safeguard points of contemporary society. From easily going online to a pc to crossing the border of a rustic, biometrics is being known as upon to satisfy the transforming into demanding situations of identification management.

With contributions from academia and by means of prime overseas experts within the box, this precise ebook offers a finished therapy of biometrics and provides insurance of the full gamut of themes within the box, together with info acquisition, pattern-matching algorithms, and concerns that impression on the method point, comparable to criteria, defense, networks, and databases. it's been prepared lower than 3 sections: sensors, advances in biometric matching algorithms, and subject matters that care for matters on the platforms level.

Key positive aspects:

• contains new algorithmic advances, together with physiological biometrics (face from video, iris at a distance) and behavioral (handwriting, voice) and a strikingly novel modality in headprint biometrics

• comprises new modalities for examine, equivalent to infrared and multispectral imaging

• offers a number of chapters at the a lot ignored region in relation to the sensors themselves for a number of the biometric modalities

• Emphasizes the advances and state of the art applied sciences throughout

• Discusses platforms point either from a human-factors standpoint and the point of view of networking, databases, privateness and anti-spoofing

• contains chapters dedicated to touchless photo trap, ultrasonic imaging and swipe methods

Written for researchers and complicated scholars, this a lot wanted concise quantity is a perfect device to take advantage of as a prepared reference and captures the very most up-to-date in state of the art learn, delivering readers with a broader and deeper realizing of the topic.

Dr Nalini okay. Ratha is a examine employees Member on the IBM Thomas J. Watson examine heart, long island. He co-edited the winning Automatic Fingerprint reputation Systems and likewise co-authored A advisor to Biometrics choice and process Design

Professor Venu Govindaraju is Director on the middle for Unified Biometrics and Sensors (CUBS), collage at Buffalo, country college of recent York.

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26 G. 1 Introduction The common procedure to capture a fingerprint requires that users either place or roll the finger on the platen of a livescan device or apply ink on the finger and then, place or roll it on a paper. In both cases, users have to apply a certain quantity of pressure to ensure that the ridges adhere completely to the capture surface. , 2003). Due to the impossibility to control the quantity and the direction of this pressure, a different impression of the same fingerprint is generated during each acquisition, making the matching more complicated and reducing the overall performance of the automated fingerprint system.

Fig. 3. Enhanced latent fingerprint left on a legacy device platen. also have easily been lifted from the device using tape and used for access at a later time. 3 Touchless Finger Imaging Touchless or contactless finger imaging is essentially a remote-sensing technology used for the capture of the ridge–valley pattern with no contact between the skin of the finger and the sensing area. The lack of contact drastically reduces the above-mentioned problems intrinsic to CFI technology. The approaches to capture a fingerprint based on touchless technology can be grouped in two main families: Reflection-based Touchless Finger Imaging (RTFI) and Transmission-based Touchless Finger Imaging (TTFI).

The feature point is uniquely represented by the t-upla {x, y, z, θ, φ}. , 1997). The most used representation considers each minutia as a triplet {x, y, θ} that indicates the (x, y) minutia location coordinates and the minutia orientation θ. 17). In addition to the coarse 3D representation of the fingerprint shape, the 3D representation obtained by the SLI approach of the University of Kentucky also provides a finer 3D description of the ridge–valley structure. Because during acquisition the finger does not touch any surface, the ridges are free of deformation.

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