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Read e-book online Biometric Authentication: First International Workshop, PDF

By Virginio Cantoni, Dimo Dimov, Massimo Tistarelli

ISBN-10: 3319133853

ISBN-13: 9783319133850

ISBN-10: 3319133861

ISBN-13: 9783319133867

This booklet constitutes the lawsuits of the 1st overseas Workshop on Biometric Authentication, BIOMET 2014, which used to be held in Sofia, Bulgaria, in June 2014. The sixteen complete papers awarded during this quantity have been rigorously reviewed and chosen from 21 submissions. also, this quantity additionally comprises five invited papers. The papers disguise various subject matters within the box gait and behavior research; iris research; speech attractiveness; 3D ear reputation; face and facial attributes research; handwriting and signature popularity; and multimodal and smooth biometrics.

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Read Online or Download Biometric Authentication: First International Workshop, BIOMET 2014, Sofia, Bulgaria, June 23-24, 2014. Revised Selected Papers PDF

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Extra info for Biometric Authentication: First International Workshop, BIOMET 2014, Sofia, Bulgaria, June 23-24, 2014. Revised Selected Papers

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Example frame with no anchor collision Fig. 7. Example frame with anchor collision Performance were measured according to the Pascal index, which offers an assessment of the validity of the determined anchor position. It is defined as: Pi ,k = ( ( ) ) B Area RiGT ,k ∩ Ri ,k , B Area RiGT ,k ∪ Ri ,k (10) An anchor tracking is considered incorrect when the corresponding Pascal index falls below a threshold set to 1/3. A frame where all anchors are tracked correctly is Using Mutual Information for Multi-Anchor Tracking of Human Beings 37 considered as valid, while if for one anchor at least the index falls below the threshold, the frame is considered invalid.

A point based method detects interest points that are considered representative in terms of a specific feature, like contour, intensity or color. Interest points have been largely used in computer vision to solve a wide range of problems like image registration, image retrieval or tracking systems. Due to the higher robustness of this kind of approach, we adopt it here. We track interest points defined as anchors, without requiring a prior separation of foreground from background. As a matter of fact, this latter task is often very complex and its precision strongly influences tracking results.

850 nm). It radiates a point-source light of a continuously-modulated harmonic signal which illuminates the scene. The light reflected from object surfaces is sensed back by pixels of the sensor chip, which collects pixel charges for some interval denoted as integration time. For each pixel, the range data is estimated in relation to phase-delay between the sensed signal and the one of the light modulator. The phase-delay estimation is performed as a discrete cross-correlation of several successively captured samples taken between equal intervals during same modulation periods of fixed frequency.

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Biometric Authentication: First International Workshop, BIOMET 2014, Sofia, Bulgaria, June 23-24, 2014. Revised Selected Papers by Virginio Cantoni, Dimo Dimov, Massimo Tistarelli

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